United States v. Aybar-Ulloa

United States Court of Appeals
For the First Circuit

No. 15-2377

UNITED STATES OF AMERICA,

Appellee,

v.

JOHVANNY AYBAR-ULLOA,

Defendant, Appellant.

APPEAL FROM THE UNITED STATES DISTRICT COURT
FOR THE DISTRICT OF PUERTO RICO

[Hon. Jay A. Garcia-Gregory, U.S. District Judge]

Before

Howard, Chief Judge,
Lynch, Thompson, Kayatta, and Barron,
Circuit Judges.*

Heather Clark, with whom Clark Law Office was on brief, for
appellant.
Scott A.C. Meisler, Attorney, U.S. Department of Justice,
Criminal Division, Appellate Section, with whom W. Stephen
Muldrow, United States Attorney, Mariana E. Bauzá-Almonte,
Assistant United States Attorney, Chief, Appellate Division, Brian
A. Benczkowski, Assistant Attorney General, and John P. Cronan,
Principal Deputy Assistant Attorney General, were on brief, for
appellee.

* Judge Torruella heard oral argument in this matter and
participated in the semble, but he did not participate in the
issuance of the opinion in this case.
Opinion En Banc

January 25, 2021
 KAYATTA, Circuit Judge. United States law enforcement

authorities apprehended Johvanny Aybar-Ulloa ("Aybar") on a

stateless vessel in international waters carrying packages of

cocaine in violation of the Maritime Drug Law Enforcement Act

("MDLEA"), 46 U.S.C. §§ 70501–70508. In appealing his subsequent

conviction, Aybar makes a two-step argument. First, he contends

that Congress's authority to criminalize and punish conduct on the

high seas under Article I, Section 8, Clause 10 of the United

States Constitution ("the Define and Punish Clause") must be

cabined by the limitations of international law on a nation's power

to criminally prosecute conduct on the high seas. Second, he

argues that the United States exceeded those limitations of

international law by prosecuting him in this case.

In a divided opinion, a panel of this court trained its

attention exclusively on the second part of Aybar's argument. See

United States v. Aybar-Ulloa, 913 F.3d 47, 53-56 (1st Cir. 2019).

Relying on prior circuit precedent, the panel majority rejected

that necessary part of Aybar's argument for two reasons: First,

we previously held in United States v. Victoria, 876 F.2d 1009

(1st Cir. 1989) (Breyer, J.), that international law does indeed

"give[] the United States . . . authority to treat stateless

vessels as if they were its own." Id. at 1010 (second alteration

in original) (quoting United States v. Smith, 680 F.2d 255, 258

(1st Cir. 1982)). Second, our prior opinion in United States v.

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Cardales, 168 F.3d 548 (1st Cir. 1999), included certain statements

construing international law as allowing a nation to define

trafficking in controlled substances aboard vessels as a threat

sufficient to justify an assertion of jurisdiction under the

"protective principle." Id. at 553.

As both the panel majority and the panel dissent

observed, our prior opinion in Victoria "did not fully spell out"

its reasoning. Aybar-Ulloa, 913 F.3d at 54; see also id. at 61

(Torruella, J., dissenting in part). Cardales, in turn, can be

read as applying only to the circumstance where a foreign flag

nation consents to the application of United States law to persons

found on that nation's flagged vessel. Id. at 55-56 (citing

Cardales, 168 F.3d at 552-53). And the question of the United

States' jurisdiction over persons on vessels on the high seas

recurs in this circuit. For those reasons, we granted Aybar's

petition to rehear this appeal en banc.

Following that rehearing, we now affirm Aybar's

conviction. In doing so, we find that his prosecution in the

United States for drug trafficking on a stateless vessel stopped

and boarded by the United States in waters subject to the rights

of navigation on the high seas violates no recognized principle of

international law. To the contrary, international law accepts the

criminal prosecution by the United States of persons like Aybar,

who was seized by the United States while trafficking cocaine on

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a stateless vessel on the high seas, just as if they were

trafficking on a United States-flagged ship. We therefore need

not and do not reach the question of whether the application of

MDLEA to Aybar would be constitutional were international law

otherwise. We also need not and do not rely on the protective

principle, leaving its potential application for another day.

Finally, for the reasons agreed upon by the full panel, we vacate

Aybar's sentence and remand for resentencing under the Sentencing

Commission's clarified guidance reflected in Amendment 794. See

id. at 56-57.

I.

A.

As Aybar urges, we take the facts as "[p]er the affidavit

[filed by the government] in support of the complaint." On

August 9, 2013, the HMS Lancaster, a foreign warship, launched a

helicopter while on patrol in the Central Caribbean. Operators

aboard the helicopter spotted a thirty-foot go-fast vessel dead in

the water at 15-03N, 067-01W, an area approximately 160 nautical

miles south of Puerto Rico constituting international waters.1 The

1 The coordinates provided by the government nonetheless
appear to place the defendant's vessel within the Exclusive
Economic Zone ("EEZ") of the United States. Because the right of
freedom of navigation on the high seas applies in the EEZ, we
proceed with reference to the rules of interdiction applicable on
the high seas. United Nations Convention on the Law of the Sea
("UNCLOS") arts. 58(1-2), 87, Dec. 10, 1982, S. Treaty Doc.
No. 103-39, 1833 U.N.T.S. 397; see generally id. pt. VII, § 1. We
- 5 -
vessel bore no indicia of nationality and was carrying numerous

packages in plain view.

A Law Enforcement Detachment Team of the United States

Coast Guard was embarked on the HMS Lancaster at the time of the

incident. Members of this team launched a small boat to conduct

a right-of-visit approach. Coast Guard personnel identified

defendant Aybar and two others aboard the go-fast vessel. Aybar

and another member of the vessel claimed to be citizens of the

Dominican Republic, while the master of the vessel claimed

Venezuelan citizenship. In response to inquiry from the Coast

Guard personnel, the master of the vessel made no claim of

nationality for the vessel. The Coast Guard personnel suspected

contraband.

Concluding that the vessel was without nationality, the

Coast Guard personnel then boarded and searched the vessel.

Following the search, the Coast Guard proceeded to take all three

men and the packages found on board back to the HMS Lancaster,

where the packages' contents tested positive for cocaine. The

three men were then transferred to a United States Coast Guard

vessel and taken to Ponce, Puerto Rico, where they were held in

custody.

do not address any potential limitations on freedom of navigation
in the EEZ that may be imposed in this area. See id. art. 58(3).

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 B.

Shortly thereafter, a federal grand jury issued an

indictment against Aybar, charging him under MDLEA with conspiring

to possess with intent to distribute cocaine on board a vessel

subject to the jurisdiction of the United States, 46 U.S.C.

§ 70506(b) (count one), and aiding and abetting possession with

intent to distribute cocaine on board a vessel subject to the

jurisdiction of the United States, 46 U.S.C. §§ 70502(c)(1)(A),

70503(a)(1), 70504(b)(1), 70506(a), 18 U.S.C. § 2 (count two).

The indictment also included an allegation of forfeiture, 46 U.S.C.

§ 70507.

MDLEA provides that "[w]hile on board a covered vessel,

an individual may not knowingly or intentionally . . . manufacture

or distribute, or possess with intent to manufacture or distribute,

a controlled substance." 46 U.S.C. § 70503(a)(1). As relevant

here, a "covered vessel" includes "a vessel subject to the

jurisdiction of the United States," id. § 70503(e)(1), which is

defined to include "a vessel without nationality," id.

§ 70502(c)(1)(A). "[A] vessel without nationality," in turn,

includes "a vessel aboard which the master or individual in charge

fails, on request of an officer of the United States authorized to

enforce applicable provisions of United States law, to make a claim

of nationality or registry for that vessel." 46 U.S.C.

§ 70502(d)(1)(B).

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 Aybar moved to dismiss the indictment for lack of

jurisdiction, arguing that Congress's power under Article I "[t]o

define and punish Piracies and Felonies committed on the high Seas,

and Offenses against the Law of Nations," U.S. Const. art. I, § 8,

cl. 10, did not reach his conduct. After the district court denied

his motion, Aybar proceeded to plead guilty. Aybar's plea accepted

the facts substantiating the charges against him under MDLEA.

Those facts, in turn, make clear that the vessel on which he was

found was "a vessel without nationality" as defined in

section 70502(d)(1)(B) because, while on board the vessel, the

master made no claim of nationality when requested to do so by a

United States officer authorized to enforce the United States drug

laws. Despite his guilty plea and concessions, Aybar adequately

preserved his challenge to Congress's constitutional power to

criminalize his conduct pursuant to its Article I powers. See

Class v. United States, 138 S. Ct. 798, 804-05 (2018). On

January 9, 2019, a divided panel rejected that challenge,

affirming his conviction. For unrelated reasons, the panel also

vacated the district court's sentence and remanded for further

proceedings.

II.

Our analysis proceeds in five parts summarized as

follows: First, the "go-fast" ship upon which Aybar travelled was

rendered "stateless" when its master on board failed upon request

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to make a valid claim of nationality for it, flouting, among other

things, the important requirement of international law that every

vessel on the high seas sail under the flag of a nation state.

Second, as a stateless vessel, the ship was susceptible to the

exercise of jurisdiction by any nation intercepting the vessel on

the high seas, just as if the vessel were one of that nation's

own. Third, the exercise of jurisdiction over Aybar's ship just

as if it were a United States vessel included jurisdiction over

drug trafficking on the vessel just as if it were drug trafficking

on a United States vessel, which is considered to be the territory

of the United States. Fourth, the application of that territorial

jurisdiction to prosecute Aybar in a United States court for

illegally trafficking cocaine is compatible with, and welcomed by,

any relevant specific rules and undertakings governing the

assertion of domestic power on the high seas. Fifth, we offer

several important caveats.

A.

Under international law governing the seas, every vessel

must sail under the flag of one, and only one, state. United

Nations Convention on the Law of the Sea ("UNCLOS") art. 92,

Dec. 10, 1982, S. Treaty Doc. No. 103-39, 1833 U.N.T.S. 397.2 In

2The United States has signed but not ratified UNCLOS. We
nevertheless cite to it as evidence of the customs and usages of
international law. See The Paquete Habana, 175 U.S. 677, 700
(1900); cf. United States v. Alaska, 503 U.S. 569, 588 n.10 (1992)
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turn, every state maintains an obligation to "fix the conditions

for the grant of its nationality to ships, for the registration of

ships in its territory, and for the right to fly its flag," id.

art. 91(1), and to "issue to ships to which it has granted the

right to fly its flag documents to that effect," id. art. 91(2).

While the type of registration papers may differ from state to

state depending on domestic laws, every state must keep a register

of "the names of all private vessels sailing under its flag," and

ensure "that every vessel may be identified from a distance."

1 L.F.L. Oppenheim, International Law §§ 290 (Jennings et al.

eds., 9th ed. 2008). "Without a flag or papers, a vessel may also

traditionally make an oral claim of nationality when a proper

demand is made." United States v. Matos-Luchi, 627 F.3d 1, 5 (1st

Cir. 2010).

This "flag-state" system -- by which all vessels are

required to fly the flag of a state, and states are in turn

required to approve the conditions for granting rights to fly their

flag -- serves several purposes. First, by subjecting vessels to

the exclusive jurisdiction of the flag state, the flag-state system

guarantees freedom of navigation in international waters, as

states generally may not interfere with the passage on the high

(noting that the United States has stated that the "baseline
provisions [of UNCLOS] reflect customary international law"
(citation omitted)).

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seas of ships lawfully flying the flag of another state. See

Richard A. Barnes, "Flag States," in The Oxford Handbook on the

Law of the Sea 313 (Rothwell et al. eds. 2015); cf. UNCLOS

arts. 87, 90. Second, the flag-state system provides clear

guidance as to which state bears the primary obligation to regulate

conduct occurring on vessels on the seas. See R.R. Churchill &

A.V. Lowe, The Law of the Sea 205 (1988); cf. UNCLOS art. 94.

Third, the flag-state system indicates which state may bear

responsibility for the conduct of a ship on the seas. See

Churchill & Lowe, supra, at 205. Thus, the flag-state system is

"[o]ne of the most important means by which public order is

maintained at sea." Id.

Aybar concedes that the ship upon which he was found

plainly did not comply with this system. It flew no flag, its

master claimed no nationality, and no other indicia of registration

or nationality were present when authorized United States

officials stopped and boarded the ship. Presumably for these

reasons, Aybar does not dispute that his vessel may be treated as

"stateless" under international law. See, e.g., Matos-Luchi, 627

F.3d at 6 (stating that a vessel "may be deemed 'stateless' . . .

if it fails to display or carry insignia of nationality and seeks

to avoid national identification").

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 B.

International law plainly provides that a nation's

warship (or law enforcement ship) may stop and board a stateless

vessel on the high seas. See UNCLOS art. 110(1)(d); Restatement

(Third) of the Foreign Relations Law of the United States

§ 522(2)(b) (1987) [hereinafter "Restatement (Third)"] ("[A]

warship or clearly-marked law enforcement ship of any state may

board [a nongovernmental ship] . . . if there is reason to suspect

that the ship . . . is without nationality . . . ."); see also

Brownlie's Principles of Public International Law 285, 292

(Crawford ed., 9th ed. 2019) [hereinafter "Brownlie's

Principles"]; Malcolm Shaw, International Law 457 (8th ed. 2017)

("A ship that is stateless, and does not fly a flag, may be boarded

and seized on the high seas."); Myres S. McDougal & William T.

Burke, The Maintenance of Public Order at Sea and the Nationality

of Ships, 54 Am. J. Int'l L. 25, 76-77 (1960) ("So great a premium

is placed upon the certain identification of vessels for purposes

of maintaining minimal order upon the high seas . . . that

extraordinary deprivational measures are permitted with respect to

stateless ships."). In short, "[b]ecause stateless vessels do not

fall within the veil of another sovereign's territorial

protection," the vessel is afforded no right of free navigation.

United States v. Rendon, 354 F.3d 1320, 1325 (11th Cir. 2003)

(quoting United States v. Caicedo, 47 F.3d 370, 373 (9th Cir.

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1995)); see also United States v. Rubies, 612 F.2d 397, 402-03

(9th Cir. 1979) ("A foreign flag[ged] vessel is thereby protected

by her country of registration. . . . An unregistered, or

'stateless,' vessel, however, does not have these rights or

protections.").

To say that international law grants to any state the

authority to interdict and exercise physical control over a

stateless vessel is to say that international law renders stateless

vessels "susceptible to the jurisdiction of any State," Barnes,

supra, at 314, including the United States. See Smith, 680 F.2d

at 258 (recognizing that "[i]nternational law . . . allows any

state to extend its authority over a stateless ship") (citing

United Nations Convention on the High Seas, 13 U.S.T. 2313,

T.I.A.S. No. 5200 (1958)); see also United States v. Juda, 46 F.3d

961, 967 (9th Cir. 1995); United States v. Martinez-Hidalgo, 993

F.2d 1052, 1055 (3d Cir. 1993); Victoria, 876 F.2d at 1010

(recognizing that international law "gives the United States . . .

authority to treat stateless vessels as if they were its own");

United States v. Alvarez-Mena, 765 F.2d 1259, 1265 (5th Cir. 1985)

("[I]nternational law does not preclude any nation from exercising

jurisdiction over stateless vessels on the high seas."); United

States v. Pinto-Mejia, 720 F.2d 248, 260-61 (2d Cir. 1983); United

States v. Marino-Garcia, 679 F.2d 1373, 1383 (11th Cir. 1982)

("[I]nternational law permits any nation to subject stateless

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vessels on the high seas to its jurisdiction."); United States v.

Howard-Arias, 679 F.2d 363, 371 (4th Cir. 1982); Malcolm D. Evans,

"The Law of the Sea," in International Law 651, 656-60 (Malcolm D.

Evans ed., 3d ed. 2010) ("[I]f a ship is stateless, or flies more

than one flag so that its true State of registry is not clear,

then any state can exercise jurisdiction over it.") (cited with

approval in Restatement (Fourth) of the Foreign Relations Law of

the United States § 408 n.3 (2018) [hereinafter "Restatement

(Fourth)"]).

In sum, there is no doubt that the United States could

exercise jurisdiction over the stateless vessel upon which Aybar

was found.

C.

Offering no persuasive reason why the United States

could not exercise jurisdiction over the stateless vessel upon

which he was found, Aybar narrows his focus to his prosecution.

While it may be clear that international law allows any state to

exercise jurisdiction over a flagless vessel, even to the point of

stopping, boarding and seizing it should they wish to do so, he

asserts that the prosecution of those on board the vessel under

the laws of the seizing country is a different matter altogether.

With respect to United States-flagged vessels, the law

does not distinguish between jurisdiction over the vessel itself

and jurisdiction over the people on the vessel and their conduct

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on board. It is well settled that the United States has

jurisdiction over conduct occurring on United States-flagged

vessels because: (1) "[t]he deck of a private American

vessel . . . is considered . . . constructively as territory of

the United States," Ross v. McIntyre, 140 U.S. 453, 464 (1891);

and (2) a state's jurisdiction over conduct on its territory is

one of "the most commonly recognized bases of jurisdiction,"

Restatement (Fourth) § 407 cmt. c; see also id. § 408 cmt. a ("A

state may exercise prescriptive jurisdiction with respect to

persons, property, and conduct within its territory."); Smith, 680

F.2d at 257 (similar). Cf. Restatement (Third) § 502 cmt. d

(explaining that a flag state has jurisdiction over "the conduct

of a ship" as well as "any activity aboard the ship").

Two centuries of case law strongly suggest that the same

territorial principles apply to conduct aboard a stateless vessel.

Shortly after our nation's founding, the United States Supreme

Court issued a series of opinions addressing the scope of the

United States' jurisdiction over conduct committed on board

non-United States vessels. The Court rejected the assertion of

jurisdiction in domestic courts over murders committed by and

against foreigners on foreign vessels. See United States v.

Furlong, 18 U.S. (5 Wheat.) 184, 196–98 (1820); see also United

States v. Klintock, 18 U.S. (5 Wheat.) 144, 151 (1820). Murders

committed by and against foreigners on stateless vessels, though,

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could be prosecuted in the United States. See Klintock, 18 U.S.

at 151–52; United States v. Holmes, 18 U.S. (5 Wheat.) 412, 417–

18; see also Furlong, 18 U.S. at 194–95 (stating that murder is

"equally punishable" in the courts of the United States when

committed on an American ship or on a stateless pirate ship, as

opposed to on a foreign ship, which presented "a question of more

difficulty").

While those cases dealt with vessels that were deemed

stateless because of piratical conduct, the Court did not hold

that piracy was the only means by which a vessel could be deemed

stateless so as to justify United States prosecutorial

jurisdiction. On that point, Holmes conveyed the opposite,

signaling that conduct of persons on board a stateless vessel could

be prosecuted whether the vessel was piratical or not:

The said Circuit Court had jurisdiction of the
offen[s]e charged in the indictment, if the
vessel, on board of which it was committed,
had, at the time of the commission thereof, no
real national character but was possessed and
held by pirates, or by persons not lawfully
sailing under the flag, or entitled to the
protection of any government whatsoever.

18 U.S. at 419.

These founding-era cases also did not hold that a foreign

national may be prosecuted in the United States for his conduct on

the high seas only if he personally renounces his nationality by

engaging in piracy. True, the Court certainly approved the

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prosecution of "those who acknowledge the authority of no State."

Klintock, 18 U.S. at 152. But the Court also repeatedly emphasized

the statelessness of the ship, rather than the nationality of the

persons on board, in upholding the United States' exercise of

jurisdiction over those persons. For example, in Klintock, the

Court held that "persons on board of a vessel not at the time

belonging to the subjects of any foreign power, but in possession

of a crew acting in defiance of all law, and acknowledging

obedience to no government whatever, . . . are proper objects for

the penal code of all nations." Id. To the extent that there is

any ambiguity as to whether the phrase "acknowledging obedience to

no government whatever" was intended to modify the "persons" or

the "vessel" at issue, the Court clarified in Holmes that the

status of the vessel was determinative:

In Klintock's case, it was laid down, that to
exclude the jurisdiction of the Courts of the
United States, in cases of murder or robbery
committed on the high seas, the vessel in
which the offender is, or to which he belongs,
must be, at the time, . . . the property of a
subject of a foreign State, and . . . subject,
at that time, to [its] control. But if the
offen[s]e be committed in a vessel, not at the
time belonging to subjects of a foreign State,
but in possession of persons acknowledging
obedience to no government or flag, and acting
in defiance of all law, it is [punishable in
the courts of the United States]. It follows,
therefore, that murder or robbery committed on
the high seas, may be an offen[s]e cognizable
by the Courts of the United States, although
it was committed on board of a vessel not
belonging to citizens of the United States, []

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 if she had no national character, but was
possessed and held by pirates, or persons not
lawfully sailing under the flag of any foreign
nation.

18 U.S. at 416–17. Because the Court in Holmes held that the

existence of jurisdiction depended on whether or not the vessel at

issue was under the control of a foreign nation, "it made no

difference, as to the point of jurisdiction, whether the

[offenders] were citizens of the United States" or citizens of

foreign nations. Id. at 419–20. As we have described, this

approach comports with the overall system of flag-state

jurisdiction. See Furlong, 18 U.S. at 198 (explaining that the

distinction between foreign vessels and stateless vessels serves

to avoid "offensive interference with the governments of other

nations").

Our concurring colleague well develops the case for

treating Holmes as binding authority dictating our holding in this

case. This is certainly a defensible view. If murder, a crime

over which there is no universal jurisdiction, can be prosecuted

by the United States when committed by a foreigner upon a foreigner

on a vessel that has no national character, why can the United

States not also prosecute drug trafficking committed by a foreigner

on such a vessel? Nevertheless, the sometimes challenging syntax

in Holmes, Furlong, and Klintock, plus the possibility that

international law itself now differs materially from international

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law as understood 200 years ago, counsel against resting our

conclusion solely on those cases if we do not need to do so. And

we do not.

No other circuit has held that conduct aboard a stateless

vessel seized by the United States on the high seas may not be

prosecuted as conduct committed on United States territory.3 See

United States v. Moreno-Morillo, 334 F.3d 819, 828 (9th Cir. 2003)

(noting that "a showing of statelessness effectively moots the

nexus requirement because those aboard stateless vessels

effectively have waived their right to object to the exercise of

jurisdiction over them by United States courts"); see also

Marino-Garcia, 679 F.2d at 1383 (concluding that stateless status

"makes the vessel subject to action by all nations proscribing

certain activities aboard stateless vessels and subjects those on

board to prosecution for violating th[ose] proscriptions"); Juda,

46 F.3d at 967 (recognizing no distinction between the right to

seize stateless vessels and the right to prosecute persons on board

them); Alvarez-Mena, 765 F.2d at 1266-67 (same).

While there is no unanimity among scholars on this point,

see Douglas Guilfoyle, "The High Seas," in The Oxford Handbook on

the Law of the Sea 218 (Rothwell et al. eds. 2015), the

Because we sustain MDLEA as applied to Aybar, we need not
3

decide whether and to what effect MDLEA should be construed as
reaching even more broadly.

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longstanding unanimity among United States courts is especially

significant, as "the state practice of the United States

contributes to the development of customary international law when

followed out of a sense of international legal right or

obligation." Restatement (Fourth) § 402 cmt. b; see also id. n.2.

Treating conduct on stateless vessels in this manner

furthers a basic aim of international law to achieve order on the

high seas by disincentivizing the use of stateless vessels.

Marino-Garcia, 679 F.2d at 1382-83. This approach also yields

significant practical benefits, such as reducing complications

when, for example, officials of the seizing nation are needed as

witnesses in a subsequent prosecution of offenses committed on the

vessel. Moreover, those who set out in stateless vessels cannot

be said to possess the same reasonable expectation of sanctuary

from foreign jurisdiction under international law as those on a

flagged vessel would. See Caicedo, 47 F.3d at 372 (distinguishing

properly flagged vessels, which have a "legitimate expectation" of

being subject only to the laws of the flag state, from stateless

vessels, which "subject themselves to the jurisdiction of all

nations" such that a state's exercise of jurisdiction over them

cannot, categorically, be said to be "arbitrary or fundamentally

unfair"); see also Moreno-Morillo, 334 F.3d at 828; Marino-Garcia,

679 F.2d at 1382 (describing stateless vessels as "international

pariahs" having "no internationally recognized right to navigate

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freely on the high seas" and finding no categorical limits to the

exercise of jurisdiction over stateless vessels under

international law). Simply put, if a person intent on drug

trafficking on the high seas wants to be prosecuted in his own

country should he be caught, he should sail under that country's

flag.

D.

Aybar contends that, notwithstanding the foregoing, his

prosecution was prohibited by other, more specific rules and

undertakings governing jurisdiction and the high seas. As we will

explain, we find that the relevant and more specific rules and

undertakings are entirely consistent with our conclusion that

Aybar was properly subject to prosecution in the United States for

his conduct on board the stateless vessel.

1.

Aybar first points to the 1988 United Nations Convention

Against Illicit Traffic in Narcotic Drugs and Psychotropic

Substances ("UN Drug Trafficking Convention"), U.N.T.S. 27627

(1988), which was adopted to give effect to UNCLOS's call on states

to "cooperate in the suppression of illicit traffic in narcotic

drugs" on the high seas, UNCLOS art. 108. Specifically, he points

out that the UN Drug Trafficking Convention does not explicitly

address the possibility of states exercising jurisdiction over

persons found engaging in drug trafficking on stateless vessels on

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the high seas. See UN Drug Trafficking Convention art. 17. But

it does not rule out such prosecutions either. To the contrary,

at least one United Nations body has suggested that states may

exercise jurisdiction under the convention over persons found

engaging in illegal activities on stateless vessels, in

combination with domestic sources of authority. See Commission on

Crime Prevention and Criminal Justice, Outcome of the Expert Group

Meeting on Transnational Organized Crime at Sea, held in Vienna,

Austria, on 5-6 April 2016, U.N. Doc. E/CN.15/2016/CRP.3, ¶ 18

(May 19, 2016) (recognizing debate over enforcement activity

against perpetrators found on stateless vessels but observing that

"if a State is party to the [UN Drug Trafficking Convention], it

should exercise jurisdiction over vessels without nationality").

To implement the UN Drug Trafficking Convention, several

European states adopted the 1995 Council of Europe Convention on

Illicit Traffic by Sea. That convention provides further support

for the proposition that international law welcomes prosecutions

by the seizing nation of those found engaged in drug trafficking

on stateless vessels: It not only allows but requires parties to

prosecute persons found trafficking drugs on stateless vessels.

See Agreement on Illicit Traffic by Sea, Implementing Article 17

of the United Nations Convention Against Illicit Traffic in

Narcotic Drugs and Psychotropic Substances art. 3, C.E.T.S. 156

(1995) (mandating that "each Party shall take such measures as may

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be necessary to establish its jurisdiction over the relevant

offen[s]es committed on board a vessel which is without

nationality, or which is assimilated to a vessel without

nationality under international law").4

Several other international law instruments similarly

leave open the possibility of states taking law enforcement action

against persons found on stateless vessels. Such instruments

typically use language indicating that states may take action "in

accordance with relevant domestic and international law" after

searching a stateless vessel on the high seas. See Brownlie's

Principles, supra, at 291 (explaining that this language

"perpetuates the ambiguity regarding the exercise of prescriptive

jurisdiction and enforcement over stateless vessels"). For

example, the 2000 Migrant Smuggling Protocol indicates with

respect to vessels without nationality that "[i]f evidence

confirming the suspicion [of smuggling] is found," the boarding

State "shall take appropriate measures in accordance with relevant

domestic and international law." See Protocol Against the

Smuggling of Migrants by Land, Sea and Air, Supplementing the

4 See also Agreement Concerning Co-Operation in Suppressing
Illicit Maritime Air Trafficking in Narcotic Drugs and
Psychotropic Substances in the Caribbean Area (not yet in force)
(signed by the United States on April 10, 2003) (providing the
same).

- 23 -
United Nations Convention Against Transnational Organized Crime

art. 8(7), U.N.T.S. 2241 (2000) (emphasis added).

Likewise, the United Nations Straddling Fish Stocks

Agreement suggests that states may take enforcement action against

stateless fishing vessels for illegal fishing "in accordance with

international law," but does not specify what such action might

entail. See Agreement for the Implementation of the Provisions of

the United Nations Convention on the Law of the Seas of 10 December

1982 Relating to the Conservation and Management of Straddling

Stocks and Highly Migratory Fish Stocks art. 21(17), Conference on

Straddling Fish Stocks and Highly Migratory Fish Stocks,

6th Sess., U.N. Doc. A/CONF.164/37 (Sept. 8, 1995); see also

Douglas Guilfoyle, Shipping Interdiction and the Law of the Sea

108 (2009) (observing that this language "accommodat[es] divergent

views as to prescriptive and enforcement jurisdiction over

stateless vessels at general international law"). Moreover,

various regional fisheries organizations have encouraged states to

take legal action where evidence is found of illegal fishing on

stateless vessels.5 See Guilfoyle, Shipping Interdiction and the

See, e.g., International Commission for the Conservation
5

of Atlantic Tunas (ICCAT), Recommendations by ICCAT on Vessel
Sightings, ¶ 3 (June 20, 2020) ("If the vessel is confirmed to be
without nationality, a competent authority . . . is encouraged to
inspect the vessel, consistent with international law and, if
evidence so warrants, the Contracting Party is encouraged to take
such action as may be appropriate, in accordance with international
law."); Northeast Atlantic Fisheries Commission, Scheme of Control
- 24 -
Law of the Sea, supra, at 129 (explaining that the Northeast

Atlantic Fisheries Commission Scheme "appears to directly

encourage the adoption of national laws permitting

extraterritorial enforcement action against stateless vessels,"

even if, like the UN Drug Trafficking Convention, it does not

itself provide for such enforcement measures); Rosemary Rayfuse,

Non-Flag State Enforcement in High Seas Fisheries 330-31 (2004).

Moreover, certain bilateral instruments to which the

United States is a party explicitly leave open the possibility of

states taking enforcement action against persons found on board

stateless vessels where the evidence so warrants. See, e.g.,

Agreement between the Government of the United States of America

and the Government of the Dominican Republic Concerning Maritime

Counter-Drug Operations, U.S.-Dom. Rep., Mar. 23, 1995, T.I.A.S.

No. 12620 (providing that counter-drug operations pursuant to the

agreement may be carried out against vessels "without

nationality," but also noting under the protocol to the agreement

that law enforcement personnel are to act in accordance with

and Enforcement, art. 38(2) (Feb. 7, 2020); see also Indian Ocean
Tuna Commission, Resolution 16/05 on Vessels Without Nationality
(Sept. 27, 2016); United Nations Food and Agriculture
Organization, Implementation of the International Plan of Action
to Prevent, Deter and Eliminate Illegal, Unreported, and
Unregulated Fishing 14-15 (2002) ("Taking action against
[stateless] vessels should be a high priority, because their very
statelessness frustrates the primary means to control fishing
activity on the high seas -- through flag State jurisdiction.").

- 25 -
international law when engaging in boardings and searches);

Agreement between the United States of America and Cyprus

Concerning Cooperation to Suppress the Proliferation of Weapons of

Mass Destruction, Their Delivery Systems, and Related Materials by

Sea, U.S.-Cyp., July 25, 2005, T.I.A.S. 06-112 (including

stateless vessels among the vessels against which operations may

be undertaken under the agreement); Agreement between the United

States of America and Belize Concerning Cooperation to Suppress

the Proliferation of Weapons of Mass Destruction, Their Delivery

Systems, and Related Materials by Sea, U.S.-Blz., Oct. 29, 2005,

T.I.A.S. 05-1019 (same); see also United States v. Bravo, 489 F.3d

1, 4 (1st Cir. 2007) (recounting that the claimed flag state could

not confirm registry of the vessel and authorized the United States

to proceed with law enforcement action under "international law").

2.

Aybar insists that UNCLOS nevertheless prohibits his

prosecution. He relies on Article 110, which provides a right to

visit ships suspected of being without nationality and to search

those ships if suspicion of statelessness remains after checking

the ship's documents. See also Aybar-Ulloa, 913 F.3d at 62-63

(Torruella, J., dissenting in part) (arguing that the unilateral

extension of domestic jurisdiction over a stateless vessel on the

high seas without a nexus violates UNCLOS). But in recognizing a

right to visit certain ships, including a ship "without

- 26 -
nationality," Article 110 does not prohibit the prosecution of

those on board. It simply remains silent as to whether and when

the visiting nation may prosecute persons found on the ship.

Aybar argues that we should draw a negative inference

from that silence because other articles of UNCLOS do contain

express grants of authority to penalize persons found on certain

vessels. For example, Article 105 authorizes the arrest and

punishment of persons found on pirate ships. Similarly,

Articles 99 and 109 expressly grant the power to penalize persons

for engaging in slavery and unauthorized broadcasting,

respectively. We reject the negative inference Aybar would have

us draw for two reasons.

First, and most simply, there are obvious differences

between the examples given and that of a stateless vessel,

undercutting any negative inference that could be drawn from the

presence of express grants in some articles but not others. For

starters, a ship engaged in piracy may retain its nationality.

UNCLOS art. 104. So there was a reason for Article 105 to

expressly confirm that any state can exercise universal

jurisdiction to seize and prosecute individuals on such a ship --

otherwise, it might have been possible to argue that only the

ship's flag state would be able to seize and prosecute those

individuals. Under this reading, Article 105 grants no new

authority. Similarly, because vessels that engage in unauthorized

- 27 -
broadcasting can retain their nationality, an exception was needed

to overcome the presumption of exclusive flag-state jurisdiction

where it was desirable for impacted states to have the possibility

of arresting "person[s] or ship[s] engaged in" this activity. See

id. art. 109(4) (providing that states receiving transmissions or

suffering from interference may exercise their jurisdiction to

prosecute unauthorized broadcasting). Further, because slave

ships also generally retain their nationality, Article 99 had to

expressly impinge on flag-state jurisdiction in order to declare

that enslaved persons found on any ship are ipso facto free.

Without these provisions -- which codify limitations on the rights

of flag states where their ships engage in conduct of severe

concern to the international community -- other states may have

presumed that their hands were tied.

Not so in the case of the stateless vessel. The

presumption of flag-state jurisdiction, which arguably made the

express grants of authority in Articles 99, 105, and 109 necessary,

simply does not apply where the vessel at issue is stateless.

Rather, as we have explained, stateless vessels are treated as

subject to the exercise of authority by any nation. Accordingly,

the absence of an express grant of authority to seize and prosecute

persons on board a stateless vessel in Article 110 does not, on

its own, establish that Aybar's seizure and prosecution are

prohibited by UNCLOS.

- 28 -
 Second, Aybar's argument cannot be squared with the

approach taken in the international instruments and undertakings

we have described. If a categorical rule against the extension of

domestic jurisdiction over stateless vessels could be found in

UNCLOS Article 110, it is unlikely that subsequent instruments

mentioning stateless vessels could avoid it or that their drafters

would have been unaware of it. Instead, it appears that in the

decades since UNCLOS was concluded, the relevant international

organizations and actors have resolved to leave the issue to the

judgment of states. See Guilfoyle, "The High Seas," supra, at 218

(explaining that "[t]reaty law is silent" on the extension of

national jurisdiction over stateless vessels without a nexus and

"sometimes deliberately ambiguous" such that existing treaty

language "covers divergent national (and academic)

interpretations").

Our reading of international law does not render the

United States an outlier. Other nations have also adopted laws

and regulations permitting exercises of domestic jurisdiction over

stateless vessels and persons found on board them. See United

Nations Food and Agriculture Organization, Implementation of the

International Plan of Action to Prevent, Deter and Eliminate

Illegal, Unreported, and Unregulated Fishing 15 (2002) (discussing

laws adopted by Canada and Norway to extend jurisdiction over

stateless vessels); see also Fisheries Jurisdiction Case (Spain v.

- 29 -
Canada), Jurisdiction, Judgment, 1998 I.C.J. Rep. 432, ¶¶ 19, 61

64, 75 (Dec. 4) (describing Canada's seizure of a vessel under its

Coastal Fisheries Protection Act, adopted to cover high seas areas

governed by the Northwest Atlantic Fisheries Organization, and the

subsequent arrest and prosecution of its master for illegal fishing

under that law, as well as Spain's response that such law

enforcement actions were permissible only if the vessel were

stateless); Molvan v. Attorney-General for Palestine, A.C. 351

(1948); Guilfoyle, "The High Seas," supra, at 218 (noting that the

United States and United Kingdom have historically taken the view

that no nexus is required to extend national jurisdiction over a

stateless vessel).6 That there is not even more evidence of similar

state practices engenders no surprise, given the practical

difficulties of seizing ships on the high seas. "[W]hile

international law may allow states to arrest stateless vessels,

states may not yet have appropriated that right unto themselves."

Rayfuse, supra, at 330 (explaining that the absence of a widespread

practice of arresting and prosecuting stateless fishing vessels

may "reflect[] . . . the reality that few states have the physical

capability to arrest these vessels on the high seas" and that

See generally Coastal Fisheries Protection Act (R.S.C.,
6

1985, c. c-33) § 5.5 (Canada); Marine Resources Act no. 37 (6 June
2008) (Norway), available at https://www.fiskeridir.no/English/
Fisheries/Regulations/The-marine-resources-act; Policing and
Crime Act 2017, c.3 § 84(1)(b) (United Kingdom), available at
https://www.legislation.gov.uk/ukpga/2017/3/section/84.

- 30 -
"states may lack a basis in their domestic legal framework

permitting their authorities to take such action").

E.

We add, finally, several caveats.

First, our holding makes no attempt to assert universal

jurisdiction over drug trafficking offenses. The holding does not

apply at all to the large majority of vessels sailing on the high

seas. Rather, it applies only to vessels flouting order and custom

on the high seas by eschewing the responsibilities and protections

of the flag-state system.

Second, we do not suggest that international law does

not apply to the seizure of the vessel or that persons on board

such vessels fall outside of the protection of international law.

See Rayfuse, supra, at 57 (explaining that "a ship without

nationality[] is not necessarily a ship without law[,] . . . [b]ut

it is a ship without protection" (quoting D.P. O'Connell, 2 The

International Law of the Sea 755 (1984))). Fundamental principles

of customary international human rights law, and requirements of

due process under United States law, may well still apply in

circumstances not present in this appeal. See Brownlie's

Principles, supra, at 285 (noting that stateless ships "are not

outside the law altogether," as "their occupants are protected by

elementary considerations of humanity"); Maarten Den Heijer,

Europe and Extraterritorial Asylum 238 (2012) (recognizing that

- 31 -
the "taking of coercive measures" against stateless vessels "is

likely to come within the ambit of human rights law"); see also

United States v. Ballestas, 795 F.3d 138, 148 (D.C. Cir. 2015);

United States v. Yousef, 327 F.3d 56, 111-12 (2d Cir. 2003) (citing

United States v. Davis, 905 F.2d 245, 248-49 (9th Cir. 1990));

Cardales, 168 F.3d at 553.

While the fundamental "arbitrariness or unfairness" of

a prosecution may depend in some part on notions of "fair warning"

under either domestic or international law, see United States v.

Van Der End, 943 F.3d 98, 106 (2d Cir. 2019), such "fair warning"

has certainly been given in the case of drug trafficking. Although

not a crime that gives rise to universal jurisdiction, see

Restatement (Fourth) § 413 n.1 (explaining that "universal

jurisdiction is limited to the most serious offenses about which

a consensus has arisen for the existence of universal

jurisdiction"); United States v. Cardales-Luna, 632 F.3d 731,

740-41 (Torruella, J., dissenting), drug trafficking has long been

regarded as a serious crime by nearly all nations. See United

Nations Treaty Depositary, Status of the United Nations Convention

against Illicit Traffic in Narcotics (accessed August 9, 2020)

(indicating that 191 states are party to the UN Drug Trafficking

Convention); see also 46 U.S.C. § 70501(1) (recognizing that

"trafficking in controlled substances aboard vessels is a serious

international problem" that "is universally condemned").

- 32 -
 Third, we opt not to decide one way or the other whether

the United States may prosecute a foreign citizen engaged in drug

trafficking on a stateless vessel where the United States never

boarded and seized the vessel. Nor do we reach the question of

whether the MDLEA by its own terms reaches such a situation. In

this case the law has been applied to a person apprehended on board

the stateless vessel when stopped and boarded by United States

Coast Guard officers. Although the government seeks a broader

ruling in its supplemental briefing, it does not abandon its

argument that "MDLEA was not unconstitutional as applied to this

case because Aybar's stateless vessel was intercepted on the high

seas" by the United States. And resolving this "as applied"

argument is all that is necessary to dispose of this appeal.

Finally, nothing in our reasoning forecloses a

successful claim of diplomatic protection by a foreign state,

should a foreign state make such a petition on behalf of its

national. See Barnes, supra, at 315; Churchill & Lowe, supra, at

172. What we hold, instead, is that international law does not

generally prohibit the United States from prosecuting drug

traffickers found on a stateless vessel stopped and boarded by the

United States on the high seas as if they had been found on a

United States vessel subject to the territorial jurisdiction of

the United States. Therefore, even if Congress's power under the

- 33 -
Define and Punish Clause is cabined by international law, Aybar's

prosecution under MDLEA would not exceed any such limitation.

III.

That leaves only Aybar's challenge to his sentence. For

the reasons stated in the panel opinion, we vacate and remand for

resentencing under the Sentencing Commission's clarified guidance,

as reflected in Amendment 794. See Aybar-Ulloa, 913 F.3d at 56–

57 (citing United States v. Sarmiento-Palacios, 885 F. 3d 1, 6

(1st Cir. 2018)).

IV.

For the foregoing reasons, we affirm the defendant's

conviction, vacate the defendant's sentence, and remand for

resentencing.

- Concurring Opinion Follows -

- 34 -
 BARRON, Circuit Judge, concurring in the judgment.

Johvanny Aybar-Ulloa ("Aybar") contends that Article I, Section 8,

Clause 10 of the United States Constitution, which authorizes

Congress to "define and punish . . . Felonies committed on the

high Seas," provides the sole constitutional source of power for

the Maritime Drug Law Enforcement Act ("MDLEA"), 46 U.S.C.

§§ 70501-70508. He further argues that there is an implicit limit

on this power, rooted in the law of nations, and that this limit

restricts Congress's authority to rely on this Clause to extend

our country's domestic criminal laws to foreign nationals who

violate them while they are outside the territorial jurisdiction

of the United States. He therefore contends that his conviction

under the MDLEA is unconstitutional, because he is a foreign

national who is alleged to have engaged in drug trafficking while

in international waters and on a vessel that is not registered to

the United States.

In pressing this contention, Aybar asserts that his

prosecution for violating the MDLEA cannot be deemed to accord

with international law on the ground that the offense for which he

was convicted is a crime against all nations. He emphasizes that

this is so because international law does not recognize drug

trafficking as a universal jurisdiction offense. He further

asserts that there is no basis under international law for

- 35 -
permitting the United States to criminalize the conduct for which

he was convicted based on an assertion of what is known as

protective jurisdiction. This is so, he contends, because there

was no nexus between his drug trafficking and the United States,

as the vessel that he was on left from one foreign country and was

headed to another. See United States v. Robinson, 843 F.2d 1, 3-

4 (1st Cir. 1988) (Breyer, J.) (noting "forceful argument" against

application of protective principle to encompass drug trafficking

on the high seas).

There is a fair amount of support for the contention

that Article I's Define and Punish Clause is impliedly limited by

the law of nations in ways that constrain Congress's authority to

rely on that Clause to subject foreign nationals to our criminal

laws for conduct that they engage on while they are on foreign

vessels -- even when those vessels are on the high seas. See

United States v. Furlong, 18 U.S. (5 Wheat.) 184, 197-98 (1820)

("Congress . . . ha[s] no right to interfere" with other nations

by "punishing [murders by foreign nationals] when committed within

the [foreign] jurisdiction, or, (what is the same thing,) in the

vessel of another nation."); see also Congressman John Marshall,

Speech to the House of Representatives (Mar. 7, 1800), in 10 Annals

of Cong. 607 (1800) (hereinafter "Speech of John Marshall")

(arguing that the Define and Punish Clause cannot authorize federal

"jurisdiction over offences, committed on board a foreign ship

- 36 -
against a foreign nation" on the high seas); Justice James Wilson,

Charge to the Grand Jury of the Circuit Court for the District of

Virginia (May 23, 1791), reprinted in 2 The Documentary History of

the Supreme Court of the United States, 1789-1800, at 179 (Maeva

Marcus ed., 1988) (suggesting that "no state or states can; by

treaties or municipal laws, alter or abrogate the law of nations"

to the extent of reaching the crime of murder by a foreigner aboard

a foreign flag ship).7 But, without disputing that point, and

without relying on either a claim that the crime involved here

qualifies as a universal jurisdiction offense or that the MDLEA is

the product of our nation's valid assertion of its protective

jurisdiction, the majority nevertheless rejects Aybar's

constitutional challenge.

The majority does so because, it rightly points out,

although Aybar was on the high seas while he was in possession of

the cocaine that led to his MDLEA charges, he was not at that time

on a foreign vessel. Instead, he was on a stateless one that our

7 In fact, the United States itself early on took the position
before the Supreme Court that the Define and Punish Clause was
subject to this limitation, even though it takes the opposite view
here. See United States v. Palmer, 16 U.S. (3 Wheat.) 610, 620
(1818) (argument of Mr. Blake on behalf of the United States) ("A
felony, which is made a piracy by municipal statutes, and was not
such by the law of nations, cannot be tried by the courts of the
United States, if committed by a foreigner on board a foreign
vessel, on the high seas; because the jurisdiction of the United
States, beyond their own territorial limits, only extends to the
punishment of crimes which are piracy by the law of nations.").

- 37 -
national authorities had interdicted in accord with international

law. Thus, in the majority's view, Aybar was within the

territorial jurisdiction of the United States when he violated the

MDLEA no less than if he had been on a ship flying our nation's

flag. See Slip Op. 4-5, 10-14. For that reason, the majority

concludes, the premise on which Aybar's constitutional challenge

rests -- that he violated the MDLEA while he was outside the

territorial jurisdiction of the United States -- is mistaken. See

id. at 33-34.

I do not disagree with the majority that Aybar's

constitutional challenge must be rejected. I write separately,

however, because I reach that conclusion through a different,

albeit somewhat related, line of reasoning.

I.

The majority observes that, under the law of nations, a

foreign national on a U.S.-flagged vessel is within the territorial

jurisdiction of the United States even when that vessel is in

international waters. Id. at 4-5, 14-15. The majority also notes

that, under the law of nations, a country's war or clearly marked

law enforcement ship may board and search a vessel in international

waters when there is adequate reason to suspect that the vessel is

stateless. Id. at 12-13; see, e.g., Restatement (Third) of the

Foreign Relations Law of the United States § 522(2)(b) & n.7 (1987)

(hereinafter "Restatement (Third)") ("[A] warship or clearly-

- 38 -
marked law enforcement ship of any state may board . . . a

ship . . . if there is reason to suspect that the ship . . . is

without nationality"; "[a] stateless vessel is not entitled

to . . . protection . . . against boarding and search.");

Brownlie's Principles of Public International Law 285, 292 (James

Crawford ed., 9th ed. 2019) (hereinafter "Brownlie's Principles")

(noting statelessness as a "circumstance[] in which a warship may

exercise the right of visit on the high seas"); Malcolm N. Shaw,

International Law 457 (8th ed. 2017) ("A ship that is stateless,

and does not fly a flag, may be boarded and seized on the high

seas.").

But, although the Third and Fourth Restatement of the

Foreign Relations Law of the United States clearly establish the

soundness of these twin propositions, see Restatement (Third)

§§ 501 cmt. c, 502(2) & cmt. d, 522(2)(b) & n.7; Restatement

(Fourth) of the Foreign Relations Law of the United States § 408

cmt. b & n.3 (2018), I do not read them to go further and establish

that the prevailing view of the law of nations is that the

interdicting country acquires the same territorial jurisdiction

over the vessel's occupants as it acquires over the vessel itself.

In fact, as the majority recognizes, Slip Op. 19, experts in

international law have long noted the disagreement that exists

over that very view, even in the case in which the interdicting

country's officials have boarded the vessel. See Brownlie's

- 39 -
Principles at 292 (noting "two schools of practice" on the question

of exercising jurisdiction over stateless vessels, one of which is

the U.S. practice that also permits criminal prosecution of those

aboard and the other which requires "some further jurisdictional

nexus," and explaining that the latter "position [is] more

consistent with existing treaty practice"); Douglas Guilfoyle,

"The High Seas," in The Oxford Handbook of the Law of the Sea 216,

218 (Donald R. Rothwell et al. eds. 2015) ("[S]cholarly views vary"

on "[t]he consequences of statelessness," and there are equally

"divergent national . . . interpretations."); Douglas Guilfoyle,

Shipping Interdiction and the Law of the Sea 17-18 (2009)

(similar). Nor have these commentators suggested that, insofar as

there is a prevailing view in this debate, it is one that is at

odds with the understanding that Aybar asks us to conclude that

international law embraces. See R.R. Churchill & A.V. Lowe, The

Law of the Sea 214 (3d ed. 1999) ("[I]t has been held . . . that

[stateless] ships enjoy the protection of no State," but the

"better view appears to be that there is [still] a need for some

[additional] jurisdictional nexus in order that a State may extend

its laws to those on board a stateless ship and enforce the laws

against them." (emphases added)); Richard Barnes, "The

International Law of the Sea and Migration Control," in

Extraterritorial Immigration Control: Legal Challenges 130-33 (B.

Ryan and V. Mitsilegas eds., 2010) (noting that "US jurisprudence"

- 40 -
notwithstanding, "it is not at all clear that attempts to

circumvent the requirement for a jurisdictional nexus . . . would

be consistent with the law of the sea"; "the fact that right of

visit and matters of enforcement are treated separately in the

[United Nations Convention on the Law of the Sea] suggests that a

positive right of visit does not imply wider enforcement powers").

Thus, insofar as the majority's understanding of the

scope of territorial jurisdiction over Aybar under the law of

nations is tied to the fact that the stateless vessel that he was

on had been seized and boarded by the United States' authorities

in the course of their attempt to determine the nation (if any) to

which the vessel belonged, see Slip Op. 19 n.3, 33, I cannot find

any clear support for that understanding in either the pertinent

Restatements or the relevant learned commentary. I should add

that I also am not aware of any precedent from U.S. courts that

would provide such support.

There is precedent from our country's courts that stakes

out a more expansive view of territorial jurisdiction under the

law of nations than Aybar would have us countenance. But, that

precedent, as I read it, does not tie that more expansive view to

a showing that the officials from the nation that is claiming

territorial jurisdiction over the foreign national on a stateless

vessel in international waters had seized and boarded the vessel

in question pursuant to their recognized right under international

- 41 -
law to determine its status. Rather, that precedent appears to

hold that foreign nationals on stateless vessels in international

waters are subject to domestic prosecution by the United States

for their conduct on board them pursuant to an assertion of the

United States' territorial jurisdiction simply because there is

support for all nations exercising such jurisdiction over vessels

that are both stateless and in such waters. See, e.g., United

States v. Rendon, 354 F.3d 1320, 1325 (11th Cir. 2003) ("Because

stateless vessels do not fall within the veil of another

sovereign's territorial protection, all nations can treat them as

their own territory and subject them to their laws." (quoting

United States v. Caicedo, 47 F.3d 370, 373 (9th Cir. 1995)));

Caicedo, 47 F.3d at 373 ("Such vessels are 'international

pariahs' . . . [and] subject themselves to the jurisdiction of all

nations 'solely as a consequence of the vessel's status as

stateless.'" (quoting United States v. Marino-Garcia, 679 F.2d

1373, 1382-83 (11th Cir. 1982))); United States v. Victoria, 876

F.2d 1009, 1010 (1st Cir. 1989) (Breyer, J.) ("[A]s United States

courts have interpreted international law, that law gives the

'United States authority to treat stateless vessels as if they

were its own.'" (alteration omitted) (quoting United States v.

Smith, 680 F.2d 255, 258 (1st Cir. 1982))); United States v. Pinto-

Meija, 720 F.2d 248, 260-61 (2d Cir. 1983) ("[S]tateless vessels

- 42 -
on the high seas are, by virtue of their statelessness, subject to

the jurisdiction of the United States.").

For these reasons, I see no clear support in either case

law or commentary for the comparatively modest proposition that

persons on stateless vessels that a foreign country's officials

have seized and boarded pursuant to their recognized right to visit

it are subject to that country's territorial jurisdiction under

international law. Instead, I find no judicial precedent

supporting that particular proposition, and much debate within the

relevant commentary about its soundness.

There is another reason that prevents me from signing on

to the majority's analysis. This reason has to do with the fact

that I understand the MDLEA to have been premised on a broader

theory of territorial jurisdiction under the law of nations than

the majority is willing to embrace. That broader theory makes

neither the physical presence of our authorities on a stateless

vessel in the high seas or those authorities' interaction with

that vessel of any legal significance in determining whether the

occupants on that vessel come within our country's territorial

jurisdiction. Instead, that broader theory makes the fact that

the occupants are on a vessel that is both stateless and in

international waters in and of itself the reason that their conduct

while on board may be said to occur within the territorial

jurisdiction of the United States. The notion that this more

- 43 -
expansive theory of territorial jurisdiction under international

law grounds the MDLEA finds support in the text of the statute

itself. The MDLEA expressly criminalizes drug trafficking on any

"vessel subject to the jurisdiction of the United States," 46

U.S.C. § 70503(e)(1), and then proceeds to define such vessels

expansively to "include[]" not just those whose crews fail to make

a claim that they belong to another nation "on request of an

officer of the United States," id. § 70502(d)(1)(B) (deeming such

vessels to be "without nationality," i.e., stateless), but also

those vessels aboard which the crew's "claim of registry . . . is

denied" or is "not affirmatively and unequivocally" affirmed "by

the nation whose registry is claimed," without reference to a

request being made by a United States officer at all, id.

§ 70502(d)(1)(A), (C) (same). In these respects, the MDLEA notably

fails to make the fact that U.S. authorities either have boarded

the vessel or even interacted with the vessel's crew at the time

of the commission of the offense a precondition for the vessel

being subject to the jurisdiction of the United States. As a

result, the MDLEA, by its terms, appears to make the bare fact

that a foreign national engages in drug trafficking while on a

stateless vessel in international waters a trigger for subjecting

the foreign national to the reach of our domestic criminal laws.

To be sure, Aybar does not dispute on appeal that his

vessel was in fact boarded by the U.S. authorities who interdicted

- 44 -
it. But, it is not evident to me that the jurisdictional basis

for his MDLEA conviction was premised on any such finding, as it

is not evident to me that any legal significance was attributed to

that fact in convicting him of violating the MDLEA.8

For that reason, it is not surprising to me that the

government describes the question concerning the scope of

8Aybar's indictment charging him with drug trafficking under
the MDLEA mentioned only that he did so "on board a vessel subject
to the jurisdiction of the United States; that is, a vessel without
nationality," without noting the physical presence of U.S.
officials on board the vessel at the time of the offense (or even
any U.S. "interaction" with the vessel or the crew), and he did
not admit to the vessel having been boarded in pleading guilty to
the offense charged in the indictment, as he was not asked to do
so, given that none of the elements of the offense made the fact
of the boarding of legal relevance to his commission of it. The
government's submissions to the District Court concerning whether
Aybar was on board a vessel subject to U.S. jurisdiction, moreover,
did not purport to make the finding that he was dependent on the
fact of the vessel having been boarded by such officials. Finally,
the District Court rejected Aybar's constitutional challenge on
the ground that the United States had territorial jurisdiction
over him while he possessed the cocaine at issue without purporting
to premise that conclusion on the fact that U.S. officials had
actually boarded his vessel. Thus, I am dubious that a conclusion
that his conviction may be affirmed against this international-
law-based constitutional challenge to Congress's Article I power
is sustainable on the basis of the vessel having been boarded
rather than on the more expansive theory that made his presence on
a stateless vessel in international waters itself dispositive of
whether he was subject to our nation's jurisdiction. Cf. United
States v. Lopez, 514 U.S. 549, 559 (1995) (holding that the Gun-
Free School Zones Act "exceeds the authority of Congress to
'regulate Commerce'" as it "neither regulates a commercial
activity nor" "contains [a] jurisdictional element which would
ensure, through case-by-case inquiry, that the firearm possession
in question affects interstate commerce" (emphasis added) (quoting
U.S. Const. Art. I § 8 cl. 3)); Richard H. Fallon, Jr., As-Applied
and Facial Challenges and Third-Party Standing, 113 Harv. L. Rev.
1321, 1332-34 (2000).

- 45 -
territorial jurisdiction that Aybar's constitutional challenge to

his MDLEA conviction implicates in terms that render both the

physical presence of our authorities on his vessel and their

interaction with it legally irrelevant. In fact, it would be

surprising to me if the government were to embrace the view that,

to ensure that the MDLEA would be enforced against a foreign

national consonant with the law of nations, our law enforcement

authorities must board the defendant's vessel (or even make contact

with it) while he is both on it and in possession of the drugs.

Such a view would appear to require the conclusion that our

government could avoid flouting the law of nations in enforcing

the MDLEA only by accepting that a foreign national on a stateless

vessel on the high seas could protect himself from the statute's

reach merely by dumping contraband from his vessel (stateless

though it is conceded to be) as soon as a ship carrying our

country's law enforcement personnel is in view. Yet, in fact, the

government has enforced the MDLEA even when the defendant had

finished possessing the drugs at issue before U.S. authorities had

made any contact with the stateless vessel on which the offense

had occurred. See, e.g., Rendon, 354 F.3d at 1322–23; Caicedo, 47

F.3d at 371.

Of course, the fact that the government makes this

broader assertion of territorial jurisdiction in asking us to

reject Aybar's constitutional challenge does not mean that the

- 46 -
government's view of the scope of the United States' territorial

jurisdiction under international law is correct. The Restatements

and commentary described above provide no clear support for the

notion that, under the law of nations, all countries are entitled

to assert territorial jurisdiction over any foreign national in

international waters who is on board a vessel that is stateless

simply because that vessel is in those waters and does not belong

to any nation. In fact, as I have explained, those materials do

not even provide clear support for the relatively narrower but

still broad proposition that a nation that exercises its right to

visit a vessel in international waters that it suspects is

stateless automatically acquires the right to assert domestic

criminal jurisdiction over that vessel's foreign-national

occupants.

I have noted above that a number of United States Circuit

Courts have endorsed the view that, under the law of nations, a

person's presence on a stateless vessel in international waters is

in itself enough to make that person subject to a foreign nation's

domestic criminal laws for the conduct in which he engages while

on board -- if, that is, the nation chooses to apply those laws to

him. See, e.g., Rendon, 354 F.3d at 1325; Caicedo, 47 F.3d at

372; Pinto-Mejia, 720 F.2d at 260-61. Thus, it is true that these

courts have signed on to the government's expansive view of

territorial jurisdiction under the law of nations.

- 47 -
 But, in doing so, these courts have supported that view

merely by citing to other circuit-level precedents, see, e.g.,

Rendon, 354 F.3d at 1325; Caicedo, 47 F.3d at 372; Victoria, 876

F.2d at 1010-11, or by treating international law authorities that

clearly establish that a nation has territorial jurisdiction over

a vessel in international waters that is stateless as if such

authorities also establish that a nation has territorial

jurisdiction over the foreign nationals who are on such a vessel,

see Pinto-Mejia, 720 F.2d at 260-61; Marino-Garcia, 679 F.2d at

1382-83; Smith, 680 F.2d at 258. For that reason, I do not see

how these precedents help to demonstrate that the law of nations

is what the government says it is.

II.

The lack of clear authority for either the government's

(or the majority's more modest but still broad) view of territorial

jurisdiction under the law of nations does not necessarily compel

us to hold that the United States lacks the constitutional

authority to extend the MDLEA to Aybar's conduct. Even if we were

to assume that the law of nations places limits on Congress's power

under the Define and Punish Clause to subject foreign nationals on

foreign vessels in international waters to our domestic criminal

laws, and even if we were to assume that the United States may not

assert protective jurisdiction over drug trafficking merely

because it occurs on stateless vessels in international waters,

- 48 -
see Robinson, 843 F.2d at 3-4, it still may be that we are in no

position to conclude that the application of the MDLEA to Aybar's

conduct in this case would violate international law -- and thus

in no position to conclude that such application would transgress

Article I.

A rule of international law that would insulate foreign

nationals on stateless vessels on the high seas from domestic

criminal jurisdiction would raise practical difficulties for law

enforcement authorities -- and not only for those from our country.

See Slip Op. 20-21. In light of those difficulties and the degree

of legal uncertainty that exists in this realm, it may be that it

would be proper for us to defer to our political branches' judgment

as to what the law of nations permits here.9 Cf. United States v.

9 Much like Congress in the MDLEA, the Executive Branch has
before taken the position that our laws may punish drug trafficking
by foreign nationals aboard stateless vessels in the high seas
consistently with international law. See, e.g., Stopping "Mother
Ships" -- A Loophole in Drug Enforcement: Hearing on S. 3437
Before the Subcomm. to Investigate Juvenile Delinquency of the H.
Comm. on the Judiciary, 95th Cong. 28 (1978) (statement of Morris
Busby, Acting Deputy Assistant Secretary, Dep't of St. Off. of
Oceans Aff.) (explaining in supporting a precursor bill to the
MDLEA that "making it a crime to possess drugs on the high seas
with an intent to distribute, whether or not the intent was to
distribute the[] drugs in the United States" "where you have a
ship without any nationality on the high seas" "would comport with
international law"); Coast Guard Drug Law Enforcement: Hearing on
H.R. 2538 Before the Subcomm. on Coast Guard and Navigation of the
H. Comm. on Merchant Marine and Fisheries, 96th Cong. 55 (1979)
(statement of Morris Busby, Director, Dep't of St. Off. of Ocean
Aff.) (elaborating that international law did, in his Department's
view, create "an exception which allows us to board a vessel on
the high seas which is without nationality," and further
- 49 -
Smith, 18 U.S. (5 Wheat.) 153, 159 (1820) (explaining that "there

is a peculiar fitness in giving the power to define as well as to

punish; and there is not the slightest reason to doubt that this

consideration had very great weight in producing the phraseology

in question"); id. at 169-72 (Livingston, J., dissenting) ("The

special power here given to define . . ., can be attributed to no

other cause, than to the uncertainty . . . in the law of nations,

and which it must have been the intention of the framers of the

constitution to remove, by conferring on the national legislature

the power which has been mentioned.").

It may also be that, as the majority suggests, see Slip

Op. 19-21, there is a "general usage and practice of nations,"

Smith, 18 U.S. (5 Wheat.) at 160-61, that supports the United

States' position. Other nations do not appear to have

affirmatively resisted our country's assertion of this expansive

view of territorial jurisdiction, and we are dealing with the

peculiar context of the high seas. Perhaps, then, it would be

prudent to reject Aybar's constitutional challenge to his

"recommend[ing] . . . that [the United States] make it a
[prosecutable] violation for [drug trafficking] to occur on board
a vessel which is stateless"; "[w]hile ordinarily the United States
does not favor a unilateral extension of jurisdiction . . . over
the activities of non-U.S. citizens on board stateless vessels
without proof of some connection to the United States, the serious
nature of [the drug trafficking] problem, and the fact that persons
on board these stateless vessels [generally] are engaged in
narcotics trafficking aimed at the United States, warrant an
extension in this particular case.").

- 50 -
conviction for this additional reason, notwithstanding that the

evidence before us of this practice consists chiefly of what other

nations have not done in response to what ours has. See Andrew W.

Anderson, Jurisdiction over Stateless Vessels on the High Seas:

An Appraisal under Domestic and International Law, 13 J. Mar. L.

& Com. 323, 331-32 (1982); Myres S. McDougal, The Law of the High

Seas in Time of Peace, 26 Naval War C. Rev. 35, 36 (1973); Myres

S. McDougal & William T. Burke, The Public Order of the Oceans: A

Contemporary International Law of the Sea 1047 (1962).

But, I am wary of rejecting Aybar's constitutional

challenge by relying on either a principle of deference to the

political branches that I am not sure obtains or a state practice

that is based only on the limited evidence of it that we have here.

Rather, I conclude that we -- as a lower court -- must reject it

due to the guidance supplied by the more than two-century-old

Supreme Court precedent to which the majority gives great weight

but ultimately concludes fails to dictate how we must decide this

case. See Slip Op. 15-19.

III.

That precedent, United States v. Holmes, 18 U.S. (5

Wheat.) 412 (1820), was among the cases that the Supreme Court

decided just decades after the Constitution's ratification and

that are sometimes referred to as the "piracy cases," G. Edward

White, The Marshall Court and International Law: The Piracy Cases,

- 51 -
83 Am. J. Int'l L. 727 (1989). The cases in this line of authority

dealt with the United States' power to prosecute defendants of a

range of citizenships and circumstances who shared the attribute

of having been indicted in our country pursuant to our criminal

justice system for murder, robbery, or other wrongdoing on the

high seas. See Holmes, 18 U.S. (5 Wheat.) 412; Furlong, 18 U.S.

(5 Wheat.) 184; Smith, 18 U.S. (5 Wheat.) 153; United States v.

Klintock, 18 U.S. (5 Wheat.) 144 (1820); United States v. Palmer,

16 U.S. (3 Wheat.) 610 (1818).

These cases were decided amidst the then-swirling debate

over whether the law of nations permitted the United States to

assert domestic criminal jurisdiction over foreign nationals who

committed crimes while on the high seas. Compare United States v.

Robins, 27 F. Cas. 825, 832 (D.S.C. 1799) ("There is no doubt that

the circuit courts of the United States have a concurrent

jurisdiction" that allows the U.S. government to prosecute the

offense of murder aboard a British ship on the high seas, "and

this arises under the general law of nations."), with Speech of

John Marshall at 598-99 ("It is not true that all nations have

jurisdiction over all offenses committed at sea. . . . [T]he

jurisdiction of th[is] nation cannot extend to a murder committed

by a British sailor, on board a British frigate navigating the

high seas under a commission from his Britannic majesty. . . . It

follows that no such common jurisdiction exists."). And Holmes

- 52 -
itself implicated that debate, as it concerned a challenge to the

legal basis for a U.S. criminal prosecution of three defendants

-- two foreigners and one U.S. citizen -- who had been indicted

for knifing and throwing overboard an individual while they were

on a vessel on the high seas that did not belong to the United

States. See Holmes, 18 U.S. (5 Wheat.) at 412-13; see also The

Trial of William Holmes, Thomas Warrington, and Edward Rosewain on

an Indictment for Murder on the High Seas Before the Circuit Court

of the United States 5 (Boston, Joseph C. Spear 1820) (hereinafter

"The Holmes Trial").

Specifically, Holmes posed the following question:

when, if ever, is "murder" by a foreign national "committed on the

high seas, . . . an offence cognizable by the Courts of the United

States"? Holmes, 18 U.S. (5 Wheat.) at 417. The Supreme Court

answered as follows.

The Court first observed that, if the murder "be

committed on board of a foreign vessel by a citizen of the United

States, or on board of a vessel of the United States by a foreigner,

the offender is to be considered . . . as belonging to the nation

under whose flag he sails." Id. at 417 (emphasis added). But,

the Court then continued, there would be jurisdiction in our

nation's courts over such a prosecution "if [the vessel] had no

national character, but was possessed and held by pirates, or

persons not lawfully sailing under the flag of any foreign

- 53 -
nations." Id. (emphasis added). And, the Court reiterated this

same understanding in the certificate,10 explaining: "the said

Circuit Court had jurisdiction of the offence charged in the

indictment [i.e., murder], if the vessel, on board of which it was

committed, had, at the time of the commission thereof, no real

national character but was possessed and held by pirates, or by

persons not lawfully sailing under the flag, or entitled to the

protection of any government whatsoever." Id. at 419 (emphasis

added).

Holmes appears to state, then, that a foreign national

is subject to the domestic criminal jurisdiction of the United

States if he commits a felony while on a vessel on the high seas

that is "not lawfully sailing under the flag of any foreign

nation." Id. at 417 (emphasis added). For this reason, Holmes

appears to sink Aybar's constitutional challenge -- by rejecting

the view that a stateless vessel in international waters is a

foreign vessel, and by supporting the view that international law

does not bar a nation from extending its domestic criminal laws to

persons who are engaged in felonious conduct on board vessels

10The "Certificate" "blend[ed] the views of all the justices
together on the broadest common position." Alfred P. Rubin, The
Law of Piracy 141 (1988).

- 54 -
lacking any national character while those vessels are in

international waters.11

Recognizing the potential threat that Holmes presents,

Aybar seeks to keep his challenge afloat in the following way. He

argues that Holmes is best read to address only the extent of

Congress's power to regulate the conduct of "piracy committed

either by a citizen or a foreigner . . . based on the universal

jurisdiction of piracy." Accordingly, he contends, Holmes

supplies no support for concluding that the law of nations

permitted his prosecution under the MDLEA, given that "drug

trafficking is not understood to be a universal jurisdiction

offense."

The problem for Aybar is that the predicate offense in

the foreign nationals' indictment in Holmes was "murder." 18 U.S.

(5 Wheat.) at 413. That is significant because it was well

understood at the time that general piracy was "rob[bery] . . . on

the high seas" and that this single category of piracy offense

was, under the law of nations, "punishable by all" -- but "[n]o

particular nation can increase or diminish the list of offences

thus punishable." Speech of John Marshall at 600; see also Smith,

11 It is worth noting that the Holmes defendants were
apprehended only after they eventually sailed their ship into a
harbor in Scituate, Massachusetts; there is no indication that
U.S. officials were aboard or interacted with the vessel at the
time of the murder. See The Holmes Trial at 6.

- 55 -
18 U.S. (5 Wheat.) at 162 ("[T]he offence [of general piracy] is

supposed to depend, not upon the particular provisions of any

municipal code, but upon the law of nations, both for its

definition and punishment."). Thus, because the charged offense

at issue in Holmes was murder on the high seas rather than robbery

on the high seas, there is little basis for concluding that the

Court understood the foreign national defendants there to have

been charged with general piracy -- and thus with a universal

jurisdiction offense -- rather than with merely a domestic felony.

That the statute of conviction in Holmes provided that

"if any person . . . shall commit, upon the high seas, . . .

murder . . . every such offender shall be deemed, taken, and

adjudged to be, a pirate and felon, and being thereof convicted,

shall suffer death," Act of April 30th, 1790, for the Punishment

of Certain Crimes Against the United States, ch. 9 § 8, 1 Stat.

113 (emphasis added), does not suggest otherwise. It was

understood at the time that "[a] statute may make any offence

piracy, committed within the jurisdiction of the nation passing

the statute, and such offence will be punishable by that nation"

-- but, unless the statutory offense was general piracy, "[t]he

jurisdiction of the nation is [here] confined to its territory and

to its own subjects." Speech of John Marshall at 600, 602

(emphases added); see also id. at 600-01 (rejecting the notion

that all "piracies at common law" are "punishable by every nation,"

- 56 -
and explaining that a statute might punish murder or other crimes

as piracy, but such a "municipal regulation could not be considered

as proving that those offences were . . . piracy by the law of

nations"); Eugene Kontorovich, The "Define and Punish" Clause and

the Limits of Universal Jurisdiction, 103 Nw. U. L. Rev. 149, 167

(2009) (explaining the then-familiar understanding that general

piracy and municipal piracy were not equivalent).

Nor is there anything in Holmes that indicates that the

Court understood the offense of murder that was at issue --

denominated though it was in the underlying federal criminal

statute as a species of piracy -- to constitute "general" rather

than "municipal" piracy. In fact, during the sentencing

proceedings in Holmes, Justice Story, who not only participated in

the case at the Supreme Court but also, while riding circuit, below

in the First Circuit, referenced the defendants' mutiny aboard the

vessel in question -- noting that the knifing had been part of a

plan to seize control of the ship -- and informed the offenders

that their conduct could have been indicted as a form of general

piracy. See The Holmes Trial at 16-17. But, Justice Story made

clear, the offense of murder on the high seas, for which the

defendants had been indicted, was not itself such an offense.

Indeed, he contrasted that offense with robbery on the high seas,

which he concluded the defendants could have been indicted for in

consequence of their "piratical usurpation and seizure of the

- 57 -
vessel," and which would have "left [them] only the character of

general pirates and enemies of the human race, who had thrown off

allegiance to all nations, and were justly amenable for [their]

crime to the tribunal of all." The Holmes Trial at 16-17; see

also Report on the Trial of Samuel Tulley and John Dalton, on an

Indictment for Piracy and Murder, Committed January 21st, 1812,

Before the Circuit Court of the United States 30-31, 33 (Boston,

J. Belcher 1812) (reporting a decision by Judge Davis, in which

Justice Story concurred, which noted that "[t]he description of

the offense [of piracy] in the first part of the 8th Section of

[the Act of 1790] is analogous to the common law description" of

piracy, as distinct from "piracy by the law of nations").

I do recognize that Holmes refers at one point to the

vessel that the defendants were on as being "piratical." 18 U.S.

(5 Wheat.) at 417. But, this reference also does not help Aybar

in his attempt to show that Holmes fails to undermine the basis

for his constitutional challenge to his conviction.

In describing the vessel from which the defendants

committed the charged offense as "piratical," Holmes was not

purporting to describe the nature of the defendants' charged

offense as one that constituted general piracy. As we have seen,

it was understood by those involved -- Justice Story among them

-- that the offense did not qualify as such. Holmes was simply

explaining why the vessel that the defendants had been on in the

- 58 -
high seas was fairly deemed to have no national character, or,

otherwise put, to be stateless as opposed to foreign, such that

the United States could subject those aboard to our laws. For, a

description of the evidence presented during the proceedings below

reveals that the vessel on which the defendants had been when

committing the murder on the high seas had earlier been unlawfully

captured in those waters by pirate ships, at least if one followed

the Court in disbelieving testimony that the seizing ships "were

publicly fitted out at Buenos Ayres" and intended to "molest[]

none but Spanish vessels." The Holmes Trial at 5, 7-8, 12; see

Eugene Kontorovich, Beyond the Article I Horizon: Congress's

Enumerated Powers and Universal Jurisdiction over Drug Crimes, 93

Minn. L. Rev. 1191, 1228 (2009) (arguing that the vessel in Holmes

was "stateless by virtue of 'turning pirate'"); see also Talbot v.

Jansen, 3 U.S. (3 Dall.) 133, 159 (1795) (opinion of Iredell, J.)

("[If] upon the enquiry it shall appear, that the vessel pretending

to be a lawful privateer, is really not such, but uses a colourable

commission for the purposes of plunder, she is to be considered by

the law of nations . . . in the same light as having no commission

at all."); The Holmes Trial at 10-11 ("If a murder be committed on

board of a ship having no national character, as on board of ships

owned and possessed by pirates, it is within the statute, if the

ship be on the high seas when the crime is perpetrated. . . .

Palmer's case goes only to exclude the operation of the statute,

- 59 -
in cases where other nations have an exclusive jurisdiction.");

cf. Palmer, 16 U.S. (3 Wheat.) at 632-33 ("The[r]e are offences

against [a] nation under whose flag the vessel sails, and within

whose particular jurisdiction all on board the vessel are. Every

nation provides for such offences the punishment its own policy

may dictate; and no general words of a statute ought to be

construed to embrace them when committed by foreigners against a

foreign government." (emphasis added)).12

Moreover, Aybar, who has waived any challenge to whether

his vessel was actually stateless, makes no argument to us that

the statelessness of a vessel in international waters permits the

foreign national aboard it to be subjected to our domestic criminal

See Letter from John Quincy Adams, U.S. Sec'y of State, to
12

Francisco Dionisio Vives, Ambassador of Spain to the U.S. (May 3,
1820), reprinted in 5 Wheat. App. 154 (1820) (explaining that "[i]n
the existing unfortunate civil war between Spain and the South
American Provinces, the United States have constantly avowed, and
faithfully maintained, an impartial neutrality," although the
United States would -- and did -- prosecute "individuals guilty of
piracy" that "illegally captured" "Spanish property" (emphasis
added)); The Holmes Trial at 11 (reporting Justice Story's charge
to the jury that "[i]f at the time when the crime was
committed, . . . this vessel was under the exclusive jurisdiction
of the Government of Buenos Ayres, then the statute does not reach
the case [of murder aboard a foreign-flagged ship], and the
Prisoners ought to be acquitted. And this depends on the fact,
whether the capture was made by the privateers, under any authority
derived from the Government of Buenos Ayres as a belligerent and
independent nation . . . [and] sailed rightfully under its
flag . . . [as this would mean] the capture was rightful, and the
captured vessel immediately after the capture, may be justly deemed
to have been exclusively under the jurisdiction of the Government
of Buenos Ayres.").

- 60 -
laws consistent with the law of nations only if the vessel is

stateless by virtue of it having engaged in conduct that qualifies

as general piracy. Aybar instead argues to us only that there is

an important distinction to be drawn under the law of nations

between offenses that are of universal jurisdiction and offenses

that are not, and that the offense for which he was charged --

drug trafficking -- is of the latter kind.

Thus, the fact that Holmes deemed the foreign nationals

who were the defendants in that case to be on a vessel lacking

national character because it was piratical lends little aid to

Aybar's cause. The offense that was at issue in Holmes was a mere

domestic felony, just like his, and it occurred on a vessel that

was stateless, just like his.13

13 Interestingly, in his charge to the jury, Justice Story
explained that the defendants could even be prosecuted if they had
committed the murder while aboard no ship:
The statute refers as to locality to "the high
seas" only, and it would be far too narrow a
construction, to limit its operation to crimes
committed on board of ships or vessels.
Murder may be committed on the high seas when
neither the murderer, or the murdered is on
board of any ship or vessel. A man may in the
sea murder another who is in the sea swimming,
or on a plank or raft; and it is obvious, that
when the death is by drowning, the murder is
committed literally on the high seas, wherever
the murderer may at the time be. . . . We see
no reason in a case of this sort, where the
murder is committed actually in the sea, why
the case which is within the literal terms of
the statute, should not be held within its
purview, whether the murder were committed by
- 61 -
 Aybar also makes no argument to us that even if Holmes

did take an expansive view of the United States' authority to

assert domestic criminal jurisdiction over foreign nationals

engaged in felonious conduct on a stateless vessel on the high

seas, intervening developments in international law preclude us

from construing Article I's Define and Punish Clause to permit

Congress to rely on that power to enact this criminal statute on

the understanding of the law of nations that Holmes embraced. His

a citizen on a citizen, or by a foreigner on
a citizen, or by a foreigner on a foreigner.
Such a case is not within the reason of
Palmer's case. Every nation has concurrent
jurisdiction with every other nation on the
high seas; and when a crime is committed on
the high seas, not on board of any ship or
vessel, it is not exclusively within the
jurisdiction of any nation; and every nation
may, if it choose, punish such crime without
doing any wrong to either nation.
The Holmes Trial at 10 (emphasis added). In Homes itself,
moreover, the Supreme Court agreed that
it makes no difference whether the offence was
committed on board of a vessel, or in the sea,
as by throwing the deceased overboard and
drowning him, or by shooting him when in the
sea, though he was not thrown overboard. The
words of the above act of Congress are
general, and speak of certain offences
committed upon the high seas, without
reference to any vessel whatsoever on which
they should be committed; and no reason is
perceived why a more restricted meaning should
be given to the expressions of the law, than
they literally import.
18 U.S. (5 Wheat.) at 418 (emphasis added).

- 62 -
only contention regarding Holmes is that it did not embrace that

understanding of the law of nations even then.

IV.

For these reasons, I am convinced that Holmes requires

that we conclude that the Define and Punish Clause is best

understood not to contain an implicit limit that would prevent the

United States from prosecuting foreign nationals for their

felonious conduct on stateless vessels in international waters.

The founding generation was attentive to the strictures of the law

of nations. See David M. Golove & Daniel J. Hulsebosch, The Law

of Nations and the Constitution: An Early Modern Perspective, 106

Geo. L. J. 1593, 1595-96 (2018) (describing "the prominent place

of the law of nations in the constitutional reform project that

culminated in the Philadelphia Convention"). And so, as between

the uncertain or even skeptical views of more contemporary

commentators on the law of nations and the seemingly unqualified

statements of the Supreme Court in Holmes, I am persuaded that the

latter must control our judgment as a lower court in this case --

at least given that state practice is not clearly contrary to what

the political branches of our country assert it to be. See United

Nurses & Allied Prof'ls v. Nat'l Labor Rels. Bd., 975 F.3d 34, 40

(1st Cir. 2020) ("We are bound by the Supreme Court's

'considered dicta.'" (quoting McCoy v. Mass. Inst. of Tech., 950

F.2d 13, 19 (1st Cir. 1991))).

- 63 -
 Accordingly, I would affirm Aybar's conviction against

his constitutional challenge to Congress's exercise of its Article

I power on the basis of Holmes, while leaving all other questions

-- including whether and when MDLEA prosecutions comport with the

Fifth Amendment's Due Process Clause -- for a case in which they

are properly raised. I do note, though, that while I reach the

same destination as the majority, the route that I take to get

there may bear on the proper answer to at least one question that

the case before us does not require us to resolve.

I do not dispute the majority's observation that "fair

warning has certainly been given" that drug trafficking is commonly

outlawed. Slip Op. 32. But, there is potentially a separate

notice question concerning whether "fair warning" exists as to

where that commonly outlawed offense may be prosecuted. Cf. Int'l

Shoe v. Washington, 326 U.S. 310, 316 (1945) ("[D]ue process

requires . . . that, in order to subject a defendant to a judgment

in personam, if he be not present within the territory of the

forum, he have certain minimum contacts with it . . . .").

It is not clear to me that our own Supreme Court's

precedent (let alone precedents from lower U.S. courts such as

ours) as to the scope of valid congressional power over misconduct

by foreign nationals on stateless vessels on the high seas could

supply fair warning on the "where" question to a foreign national.

At least, I am not sure that it could do so if other authoritative

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sources for determining the content of the law of nations -- ones

not generated solely by a single country's legal system -- do not

themselves provide fair warning that all nations possess

territorial jurisdiction over the conduct of foreign nationals on

board stateless vessels in international waters and thereby makes

them potentially subject to prosecution in any nation under its

domestic criminal laws.

Aybar, however, does not pursue a due process challenge

to his conviction. I thus see no need to decide here whether the

law of nations, uncertain though it appears to me to be in that

respect, is nonetheless clear enough to provide a person who

ventures into international waters in a stateless vessel the

constitutionally requisite degree of warning of the risk of being

prosecuted in a foreign forum for drug trafficking while on board

that vessel. Nor do I see any reason to decide in this case

whether Holmes itself requires us to conclude that, despite what

more modern commentary suggests, the law of nations is clear enough

on that score to mitigate any notice concerns that might be of a

constitutional magnitude.

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