United States Court of Appeals
FOR THE DISTRICT OF COLUMBIA CIRCUIT
Argued October 5, 2006 Decided December 15, 2006
No. 05-5352
THE FUND FOR ANIMALS, INC., ET AL.,
APPELLANTS
v.
DIRK KEMPTHORNE, SECRETARY OF THE INTERIOR, ET AL.,
APPELLEES
Appeal from the United States District Court
for the District of Columbia
(No. 05cv00777)
Joshua R. Stebbins argued the cause for appellants. With
him on the briefs were Howard M. Crystal and Eric R.
Glitzenstein.
Kathryn E. Kovacs, Attorney, U.S. Department of Justice,
argued the cause for appellees. With her on the brief was Ellen
Durkee, Attorney, U.S. Department of Justice.
Douglas S. Burdin and Anna M. Seidman were on the brief
for appellees Safari Club International, Safari Club International
Foundation, and Ducks Unlimited.
2
Before: ROGERS, GARLAND and KAVANAUGH, Circuit
Judges.
Opinion for the Court filed by Circuit Judge KAVANAUGH.
Concurring opinion filed by Circuit Judge KAVANAUGH.
KAVANAUGH, Circuit Judge. The United States is a party
to international conventions with Canada and Mexico for the
protection of migratory birds. Congress has implemented those
conventions through the Migratory Bird Treaty Act, a statute
first passed in 1918. The statute makes it unlawful to hunt or
kill migratory birds “included in the terms of the conventions.”
16 U.S.C. § 703(a). In 2001, this Court concluded that the
migratory birds protected under the Act included the mute swan.
See Hill v. Norton, 275 F.3d 98 (D.C. Cir. 2001).
After the Hill decision, Congress enacted the Migratory
Bird Treaty Reform Act. The Reform Act amends the
Migratory Bird Treaty Act so that the statute applies “only to
migratory bird species that are native to the United States or its
territories.” 16 U.S.C. § 703(b)(1). As the parties here agree,
the mute swan is not native to the United States or its territories.
As a result, the amended statute by its terms no longer prohibits
the hunting or killing of the mute swan.
The plaintiffs in this case have advanced a variety of
arguments why the amended Migratory Bird Treaty Act
nonetheless continues to protect mute swans. We reject
plaintiffs’ contentions. The text of the statute is plain: The
amended Migratory Bird Treaty Act does not ban the hunting or
killing of non-native migratory bird species, including mute
swans.
3
I
1. In 1916, the United States entered into a convention with
Canada for the protection of migratory birds; in 1936, the United
States entered into a similar convention with Mexico.
Convention for the Protection of Migratory Birds, U.S.-Gr. Brit.,
Aug. 16, 1916, 39 Stat. 1702; Convention for the Protection of
Migratory Birds and Game Mammals, U.S.-Mex., Feb. 7, 1936,
50 Stat. 1311. See generally Hill v. Norton, 275 F.3d 98, 100-01
(D.C. Cir. 2001) (surveying those treaty provisions, as well as
two later conventions with Japan and the former Soviet Union).
The Canada and Mexico conventions expressly cover the family
Anatidae. Canada Convention, art. I, § 1(a), 39 Stat. at 1702;
Mexico Convention, art. IV, 50 Stat. at 1313. That family
includes the mute swan, thought to be a European species
originally brought to the United States for ornamental purposes.
Hill, 275 F.3d at 99; see Draft List of Bird Species to Which the
Migratory Bird Treaty Act Does Not Apply, 70 Fed. Reg. 372,
373-74 (Jan. 4, 2005) (surveying evidence of mute swan origin).
In 1918, Congress passed and President Wilson signed the
Migratory Bird Treaty Act. The Act’s prohibition has remained
largely the same since enactment. Unless authorized by
regulations administered by the Secretary of the Interior,
it shall be unlawful at any time, by any means or in
any manner, to pursue, hunt, take, capture, kill, attempt
to take, capture, or kill, possess, offer for sale, sell,
offer to barter, barter, offer to purchase, purchase,
deliver for shipment, ship, export, import, cause to be
shipped, exported, or imported, deliver for
transportation, transport or cause to be transported,
carry or cause to be carried, or receive for shipment,
transportation, carriage, or export, any migratory bird,
any part, nest, or egg of any such bird, or any product,
4
whether or not manufactured, which consists, or is
composed in whole or part, of any such bird or any
part, nest, or egg thereof, included in the terms of the
conventions . . . .
16 U.S.C. § 703(a) (emphasis added); see Migratory Bird Treaty
Act, ch. 128, 40 Stat. 755, 755 (1918) (statute as originally
enacted).
Starting in the 1970s, the Secretary of the Interior regularly
published a list of species protected under the Act. The list did
not include the mute swan. A citizen eventually challenged the
Secretary’s decision not to protect the mute swan. In Hill, we
concluded that the Secretary’s interpretation of the Migratory
Bird Treaty Act was not reasonable when measured against the
statutory text: The statute covers birds “included in the terms of
the conventions” themselves, and we stated that the Canada
convention “undisputably include[s] mute swans.” Hill, 275
F.3d at 104. Although the Secretary argued that the mute swan
was not protected because it was not native to the United States,
we stated that the Secretary pointed to “nothing in the statute,
applicable treaties, or administrative record” to support an
exclusion for non-native species. Id. at 105-06. The text of the
Migratory Bird Treaty Act and the Canada convention’s
references to “swans” weighed against such an exclusion and
meant that the Secretary’s interpretation was not reasonable. Id.
at 106. (The opinion focused solely on the Canada convention
because it imposed the strictest limitation on the hunting or
killing of migratory birds. Id. at 103-04.)
2. In 2004, after the Hill decision, Congress passed and
President Bush signed the Migratory Bird Treaty Reform Act.
See Consolidated Appropriations Act, 2005, Pub. L. No. 108-
447, Div. E, Title I, § 143, 118 Stat. 2809, 3071-72 (2004)
(codified at 16 U.S.C. § 703). The Reform Act amended the
5
Migratory Bird Treaty Act’s prohibition on killing or hunting
migratory birds so that the statute “applies only to migratory
bird species that are native to the United States or its territories.”
16 U.S.C. § 703(b)(1). The Reform Act further defined the term
“native to the United States or its territories” to mean “occurring
in the United States or its territories as the result of natural
biological or ecological processes.” Id. § 703(b)(2)(A). And
subject to certain exceptions not relevant here, the Reform Act
provided that “a migratory bird species that occurs in the United
States or its territories solely as a result of intentional or
unintentional human-assisted introduction shall not be
considered native to the United States or its territories . . . .” Id.
§ 703(b)(2)(B). Congress directed the Secretary of the Interior
to issue within 90 days of the Reform Act’s enactment and after
public comment “a list of all nonnative, human-introduced bird
species to which the Migratory Bird Treaty Act does not apply.”
Consolidated Appropriations Act, Div. E, Title I, § 143(c)
(citation omitted).
The Reform Act also expressed Congress’s apparent
disagreement with this Court’s Hill decision as to the meaning
of the migratory bird conventions: “It is the sense of Congress
that the language of this section is consistent with the intent and
language of the 4 bilateral treaties implemented by this section.”
Id. § 143(d). In other words, Congress indicated its belief that
the Canada convention and the other three migratory bird
conventions did not cover non-native species such as the mute
swan.
Consistent with the Reform Act, the Fish and Wildlife
Service, which is part of the Department of the Interior,
promptly published and sought comment on a draft list of non-
native species that would not be protected under the statute. See
Draft List of Bird Species to Which the Migratory Bird Treaty
Act Does Not Apply, 70 Fed. Reg. 372 (Jan. 4, 2005). The list
6
excluded the mute swan from protection. Id. at 373-74. The
Service pointed to the scientific and historical evidence that the
species is not native to this continent. “All existing populations
of the mute swan in North America,” the Service noted, “are
derived from introduced stocks that were released or escaped at
different localities and in different years and eventually
established feral populations.” Id. at 373.
The Humane Society of the United States, an animal
welfare organization, submitted comments opposing the
Service’s designation. The Service treated those comments as
a petition for rulemaking under the Administrative Procedure
Act to change the mute swan’s designation, which the Service
denied. See Final List of Bird Species to Which the Migratory
Bird Treaty Act Does Not Apply, 70 Fed. Reg. 12,710, 12,713
(Mar. 15, 2005). The Service published its final rule in March
2005, and the list excluded mute swans. Id. at 12,714-15.
The Maryland Department of Natural Resources then
informed the Humane Society of its intention to begin killing
adult mute swans in the Chesapeake Bay in the spring of 2005.
Maryland had previously concluded that such killing was
necessary because the mute swan population, which had surged
“dramatically between 1986 and 1999,” now posed a danger to
the bay ecosystem. WILDLIFE & HERITAGE SERV., MD. DEP’T
OF NATURAL RES., MUTE SWANS IN MARYLAND: A STATEWIDE
MANAGEMENT PLAN 4 (2003). Maryland determined that the
mute swan population consumed and disrupted large quantities
of underwater plants that “protect water quality . . . [,] prevent
erosion,” and provide food and shelter for fish, shellfish,
invertebrates, and other birds indigenous to the Bay. Id. at 10;
see also Hill, 275 F.3d at 99 (noting “information to suggest that
mute swans cause ecological damage”).
3. The Fund for Animals, Inc., is an affiliate of the Humane
7
Society. In April 2005, the Fund and three individuals sued the
Secretary under the Administrative Procedure Act, 5 U.S.C. §§
702, 706(2)(A). Plaintiffs conceded that the mute swan was not
native to the United States or its territories. The complaint
nonetheless challenged the Service’s decision not to list the
mute swan as protected, asserting that the statute continues to
require protection of the mute swan. Complaint at 12-13, Fund
for Animals v. Norton, 374 F. Supp. 2d 91 (D.D.C. 2005) (No.
05-cv-777). The complaint sought a court order that would,
among other things, direct the Service “to notify the State of
Maryland . . . that Mute Swans may not be killed” without a
permit from the Service. Id. at 13. Plaintiffs also moved for a
preliminary injunction. Three parties that aim to promote
hunting as a means of wildlife conservation moved to intervene
as defendants: the Safari Club International, the Safari Club
International Foundation, and Ducks Unlimited. Those
defendant-intervenors emphasized that the mute swans compete
with and behave aggressively toward birds indigenous to the
Chesapeake Bay – in other words, that the mute swans are
harmful to the environment. See Fund for Animals v. Norton,
374 F. Supp. 2d 91, 93-94 (D.D.C. 2005).
After a hearing, the District Court denied the preliminary
injunction. The District Court concluded that the “defendants’
overwhelming likelihood of success on the merits outweighs any
other equitable factors favoring plaintiffs.” Id. at 93. The
District Court stated that “nothing in the Reform Act itself
appears ambiguous,” and the Reform Act’s terms showed “that
Congress intended to modify the [Migratory Bird Treaty Act] to
exclude nonnative species.” Id. at 102. Even if the Reform Act
conflicted with the migratory bird conventions with Canada and
other nations, the District Court concluded the Reform Act
controlled because “Congress clearly has the power to abrogate
or modify a treaty or earlier legislation, and when it does so, that
is the final word.” Id. at 103.
8
At the parties’ request, the District Court converted this
ruling into a final judgment on the merits. See Fed. R. Civ. P.
65(a)(2). This appeal followed. We review de novo the legal
question whether the Secretary’s decision to exclude mute swans
from protection was consistent with the Migratory Bird Treaty
Act.
II
Standing to sue is a threshold question. See
DaimlerChrysler Corp. v. Cuno, 126 S. Ct. 1854, 1861 (2006).
In Hill, we held that the plaintiff, a Maryland property owner
who enjoyed the presence of mute swans on her property,
satisfied the constitutional prerequisite for invoking federal
jurisdiction – namely, injury in fact fairly traceable to the
conduct of the defendants and redressable by judicial relief. 275
F.3d 98, 102-03 (D.C. Cir. 2001). The same is true here. Two
of the individual plaintiffs are Maryland residents with mute
swans on their property. Under Hill, those plaintiffs suffer
injury in fact because of the Service’s designation of the mute
swan as a species not protected by the Migratory Bird Treaty
Act. That action freed Maryland to kill a portion of the
Chesapeake Bay mute swan population, which would include
the swans on those residents’ property. Judicial invalidation of
the designation would restore protection to the mute swan and
make Maryland’s plan unlawful. The Maryland plaintiffs have
standing. We therefore need not evaluate the standing of the
third individual plaintiff, a Massachusetts resident who makes
weekly visits to a pond inhabited by mute swans, or of the Fund
itself.
III
1. The Migratory Bird Treaty Act provides that, with
certain exceptions, “it shall be unlawful . . . [to] hunt . . . [or] kill
9
. . . any migratory bird . . . included in the terms of the
conventions.” 16 U.S.C. § 703(a). Enacted in 2004, the
Migratory Bird Treaty Reform Act amended this long-standing
statutory prohibition on hunting or killing migratory birds to
make clear that the statute “applies only to migratory bird
species that are native to the United States or its territories.” 16
U.S.C. § 703(b)(1). As the Secretary determined and the parties
here agree, the mute swan is not a native migratory bird species.
It follows, therefore, that the Migratory Bird Treaty Act does not
protect the mute swan.
Plaintiffs argue that this approach is too straightforward,
contending in essence that this provision of the Reform Act does
not mean what it says. Their argument relies on the separate
“sense of Congress” provision in the Reform Act, which states:
“It is the sense of Congress that the language of this section is
consistent with the intent and language of the 4 bilateral treaties
implemented by this section.” Consolidated Appropriations Act,
Div. E, Title I, § 143(d).
Plaintiffs’ creative attempt to weave ambiguity out of
clarity goes as follows: Plaintiffs state that this Court was
correct to conclude in Hill v. Norton that the migratory bird
conventions cover the mute swan. 275 F.3d 98, 104 (D.C. Cir.
2001). Although the Reform Act on its face excludes the mute
swan, plaintiffs point out that Congress also indicated its “sense”
that the amended statute is consistent with the conventions.
Given the apparent conflict between the conventions and the
amended statute, together with Congress’s stated belief that
there is no such conflict, plaintiffs contend that the statute must
be deemed ambiguous. And plaintiffs argue that we must
therefore apply the canon of construction that ambiguous
statutes should not be interpreted to abrogate a treaty (namely,
the conventions’ protection of the mute swan).
10
Plaintiffs’ argument is mistaken at each turn. The statute is
not ambiguous, and for that reason the canon against abrogation
does not apply.
2. Plaintiffs base their argument that the statute is
ambiguous on the sense of Congress provision in the Reform
Act. Indeed, plaintiffs recognize that the statute is clear but for
the sense of Congress provision. See Tr. of Oral Arg. 4.
Plaintiffs’ interpretation of the sense of Congress provision is
incorrect. By setting forth its “sense” that the Reform Act is
“consistent with” the migratory bird conventions, Congress
merely suggested that it believes the conventions, as originally
adopted, covered only native species of migratory birds. Read
most naturally, the sense of Congress provision indicates
nothing more than Congress’s disagreement with this Court’s
2001 decision in Hill (which had concluded that the Canada
convention “undisputably include[s] mute swans,” 275 F.3d at
104). The sense of Congress provision makes clear that the
Reform Act was not an attempt to limit or back away from
America’s treaty obligations, but rather was a correction of what
Congress believed to be an erroneous judicial interpretation of
a treaty. In any event, Congress may or may not be correct in its
interpretation of the conventions’ original scope, but that is of
no moment in this case. The sense of Congress provision does
not in any way alter the plain text of the Reform Act’s other
provisions, which clearly and unambiguously provide that the
Migratory Bird Treaty Act does not protect non-native species
such as the mute swan.
Plaintiffs’ interpretation of the sense of Congress provision
would render the Reform Act meaningless, as plaintiffs candidly
acknowledge. See Tr. of Oral Arg. 7. Even accepting that
Congress on occasion may enact a statute that turns out to have
no effect, courts presume that Congress has used its scarce
legislative time to enact statutes that have some legal
11
consequence. See Plaut v. Spendthrift Farm, Inc., 514 U.S. 211,
216 (1995) (interpretation that would leave a statute “utterly
without effect” is “a result to be avoided if possible”); see also
2A NORMAN J. SINGER, STATUTES AND STATUTORY
CONSTRUCTION § 46:06 (6th ed. 2000) (“A statute should be
construed so that effect is given to all its provisions, so that no
part will be inoperative or superfluous, void or insignificant, and
so that one section will not destroy another unless the provision
is the result of obvious mistake or error.”) (footnotes omitted).
That plaintiffs interpret the Reform Act to be an empty gesture
is yet another indication that their submission is erroneous.
The Government also points out that plaintiffs’ position is
inconsistent with the Reform Act’s legislative history, which
contains evidence that Members of Congress specifically
intended to exclude the mute swan and other non-native birds
from the Migratory Bird Treaty Act’s coverage. See, e.g., S.
REP. NO. 108-313, at 2-3 (2004); H.R. REP. NO. 108-520, at 5-6
(2004). On that point, however, plaintiffs persuasively respond
that those legislative materials are of little value because the
version of the legislation under consideration when the Senate
and House reports were written did not yet include the sense of
Congress provision. In fact, the Government concedes that
“[n]o legislative history explains the addition of that provision
to the Reform Act.” Appellees’ Br. at 35. We agree with
plaintiffs that the legislative history cited by the Government is
not helpful in construing this statute. The Government’s
legislative history argument in this case – which relies on pieces
of legislative history unconnected to the key language in the
statute – is a good example of misusing snippets of legislative
history from a dynamic and evolving legislative drafting
process. Cf. Bd. of Educ. of Westside Cmty. Sch. (Dist. 66) v.
Mergens, 496 U.S. 226, 238 (1990).
Given our interpretation of the sense of Congress provision,
12
we need not consider the Government’s argument that sense of
Congress provisions are generally considered to be no more than
non-binding statements of policy. See Yang v. Cal. Dep’t of
Soc. Servs., 183 F.3d 953, 959 (9th Cir. 1999) (“[T]he courts
rely on the sense of Congress provisions to buttress
interpretations of other mandatory provisions and do not
interpret them as creating any rights or duties by themselves.”);
Monahan v. Dorchester Counseling Ctr., Inc., 961 F.2d 987,
994-95 (1st Cir. 1992); Trojan Techs., Inc. v. Pennsylvania, 916
F.2d 903, 908-09 (3d Cir. 1990).
3. In the second part of their argument, plaintiffs cite the
canon of construction that ambiguous statutes should not be
construed to abrogate treaties. That argument lacks merit. The
canon applies only to ambiguous statutes (and as we have just
explained, this statute is not ambiguous).
The Constitution establishes that statutes enacted by
Congress with the concurrence of the President (or over his
veto) have no less weight than treaties made by the President
with the advice and consent of two-thirds of the Senate. See
U.S. CONST. art. II, § 2, cl. 2; U.S. CONST. art. VI, cl. 2; Foster
v. Neilson, 27 U.S. (2 Pet.) 253, 314 (1829) (Marshall, C.J.).
Consistent with this doctrine, the Supreme Court has long
recognized that a later-enacted statute trumps an earlier-enacted
treaty to the extent the two conflict. This is known as the last-
in-time rule. See Whitney v. Robertson, 124 U.S. 190, 194
(1888) (if self-executing treaty and statute “are inconsistent, the
one last in date will control the other”); see also Breard v.
Greene, 523 U.S. 371, 376 (1998); Kappus v. Comm’r, 337 F.3d
1053, 1057 (D.C. Cir. 2003); S. African Airways v. Dole, 817
F.2d 119, 124-26 (D.C. Cir. 1987). At the same time, the
Supreme Court also has stated that an ambiguous statute should
be construed where fairly possible not to abrogate a treaty. See
Trans World Airlines, Inc. v. Franklin Mint Corp., 466 U.S. 243,
13
252 (1984); see also Roeder v. Islamic Republic of Iran, 333
F.3d 228, 237 (D.C. Cir. 2003); S. African Airways, 817 F.2d at
125. The combination of the last-in-time rule and the canon
against abrogation has produced a straightforward practice:
Courts apply a statute according to its terms even if the statute
conflicts with a prior treaty (the last-in-time rule), but where
fairly possible, courts tend to construe an ambiguous statute not
to conflict with a prior treaty (the canon against abrogation).
The canon against construing ambiguous statutes to
abrogate prior treaties does not help plaintiffs here, however,
because the amended Migratory Bird Treaty Act is
unambiguous, as we concluded above. To accept plaintiffs’
argument with respect to the canon, we would have to distort the
plain meaning of a statute in an attempt to make it consistent
with a prior treaty. The Supreme Court has not extended the
canon that far, and for good reason: Distorting statutory
language simply to avoid conflicts with treaties would elevate
treaties above statutes in contravention of the Constitution.
***
The Migratory Bird Treaty Act implements the migratory
bird conventions. The Migratory Bird Treaty Reform Act
amends that earlier statute and makes clear that mute swans are
not protected by the Act. The canon against interpreting a
statute to abrogate a treaty does not apply because the amended
statute is plain. We affirm the District Court’s judgment.
So ordered.
KAVANAUGH, Circuit Judge, concurring: Plaintiffs argue
that the amended Migratory Bird Treaty Act is ambiguous, and
they rely on the canon against construing an ambiguous statute
to abrogate a treaty. The Court concludes that the statute is
plain and that the canon therefore does not apply. I add this
concurrence because, even assuming the statute is ambiguous,
the canon should not apply in cases involving non-self-executing
treaties such as the migratory bird conventions.
1. The Supreme Court has stated that a self-executing
treaty is one that “operates of itself without the aid of any
legislative provision,” whereas a non-self-executing treaty
“addresses itself to the political, not the judicial department; and
the legislature must execute the contract before it can become a
rule for the Court.” Foster v. Neilson, 27 U.S. (2 Pet.) 253, 314
(1829) (Marshall, C.J.); see also Chae Chan Ping v. United
States, 130 U.S. 581, 600 (1889); Whitney v. Robertson, 124
U.S. 190, 194 (1888); Head Money Cases, 112 U.S. 580, 598-99
(1884). Like statutes, self-executing treaties automatically
become part of domestic American law. By contrast, non-self-
executing treaties have no effect or force as a matter of domestic
law (though Congress may choose to incorporate parts of non-
self-executing treaties into domestic law by enacting
implementing statutes). See Whitney, 124 U.S. at 194 (“When
the stipulations [of a treaty] are not self-executing, they can only
be enforced pursuant to legislation to carry them into effect, and
such legislation is as much subject to modification and repeal by
congress as legislation upon any other subject.”); see also 1
RESTATEMENT (THIRD) OF THE FOREIGN RELATIONS LAW OF
THE UNITED STATES § 111 cmt. h (1987) (“[S]trictly, it is the
implementing legislation, rather than the agreement itself, that
is given effect as law in the United States. That is true even
when a non-self-executing agreement is ‘enacted’ by, or
incorporated in, implementing legislation.”).
The canon against interpreting ambiguous statutes to
abrogate treaties applies with respect to self-executing treaties,
2
which have the force of American law. See Trans World
Airlines, Inc. v. Franklin Mint Corp., 466 U.S. 243, 252 (1984);
Cook v. United States, 288 U.S. 102, 119-20 (1933). The canon
is quite similar to the familiar doctrine against implied repeal of
statutes – under which courts will not interpret an ambiguous
statute to repeal a prior statute. See J.E.M. Ag Supply, Inc. v.
Pioneer Hi-Bred Int’l, Inc., 534 U.S. 124, 141-42 (2001); see
also S. African Airways v. Dole, 817 F.2d 119, 126 (D.C. Cir.
1987) (noting that Supreme Court has “compared the abrogation
of a treaty through an act of Congress to the repeal of one statute
by another . . . [because] ‘the rule is well settled that repeals by
implication are not favored . . . .’” (quoting Chew Heong v.
United States, 112 U.S. 536, 549 (1884))).
There is little authority squarely analyzing whether those
interpretive principles should extend to non-self-executing
treaties, which have no force as a matter of domestic law.
Courts have reason to be cautious about taking that step,
however. When the Legislative and Executive Branches have
chosen not to incorporate certain provisions of a non-self-
executing treaty into domestic law, we must assume that they
acted intentionally. Given such a deliberate decision by the
Legislative and Executive Branches, basic principles of judicial
restraint counsel courts to refrain from bringing the non-self-
executing treaty into domestic law through the back door (by
using the treaty to resolve questions of American law). In other
words, because non-self-executing treaties have no legal status
in American courts, there seems to be little justification for a
court to put a thumb on the scale in favor of a non-self-executing
treaty when interpreting a statute. Doing so would not reflect
the appropriate judicial deference to the Legislative and
Executive Branches in determining if, when, and how to
incorporate treaty obligations into domestic law.
Concluding that the canon does not apply with respect to
3
non-self-executing treaties “in no way disparages the
importance” of treaty obligations. Sanchez-Llamas v. Oregon,
126 S. Ct. 2669, 2687 (2006). Rather, it respects the proper
limits and role of the Judiciary in relation to the Legislative and
Executive Branches. See 1 RESTATEMENT (THIRD) OF THE
FOREIGN RELATIONS LAW OF THE UNITED STATES § 111(3)
(1987) (“Courts in the United States are bound to give effect to
international law and to international agreements of the United
States, except that a ‘non-self-executing’ agreement will not be
given effect as law in the absence of necessary
implementation.”).
To be sure, the canon has been referenced in passing in
some cases that may involve non-self-executing treaties. And
some have expressly concluded that the canon should apply
even with respect to non-self-executing treaties. See Ma v.
Ashcroft, 257 F.3d 1095, 1114 (9th Cir. 2001); see also David
Cole, The Idea of Humanity: Human Rights and Immigrants’
Rights, 37 COLUM. HUM. RTS. L. REV. 627, 647 (2006). But that
conclusion is questionable in light of the principles of judicial
restraint outlined above (even if one were to accept a more
limited proposition that non-self-executing treaties may warrant
“respectful consideration” in interpreting certain statutes, cf.
Sanchez-Llamas, 126 S. Ct. at 2685).
2. If the canon against abrogation does not apply with
respect to non-self-executing treaties, plaintiffs’ reliance on the
canon in this case necessarily rests on an assumption that the
migratory bird conventions are self-executing. The migratory
bird conventions, however, are non-self-executing.
Courts generally hold a treaty is non-self-executing when
one of the following conditions applies:
• the treaty itself contemplates implementing legislation,
4
see Foster, 27 U.S. at 314; Diggs v. Richardson, 555 F.2d 848,
851 (D.C. Cir. 1976); see also Frolova v. Union of Soviet
Socialist Republics, 761 F.2d 370, 376 (7th Cir. 1985);
Mannington Mills, Inc. v. Congoleum Corp., 595 F.2d 1287,
1298-99 (3d Cir. 1979); United States v. Postal, 589 F.2d 862,
876-77 (5th Cir. 1979);
• the treaty provides no private right of action, see Head
Money Cases, 112 U.S. at 598-99; Argentine Republic v.
Amerada Hess Shipping Corp., 488 U.S. 428, 442-43 (1989);
Comm. of U.S. Citizens Living in Nicaragua v. Reagan, 859 F.2d
929, 938 (D.C. Cir. 1988); Tel-Oren v. Libyan Arab Republic,
726 F.2d 774, 808 (D.C. Cir. 1984) (Bork, J., concurring); see
also Goldstar (Panama) S.A. v. United States, 967 F.2d 965, 968
(4th Cir. 1992);
• the Executive Branch or Senate indicates during the
treaty-making or treaty-ratifying process, for example, that the
treaty is non-self-executing, see Sosa v. Alvarez-Machain, 542
U.S. 692, 728, 735 (2004); see also Renkel v. United States, 456
F.3d 640, 644 (6th Cir. 2006); Frolova, 761 F.2d at 376;
• the treaty provisions are precatory, aspirational, or
otherwise too vague to be judicially enforceable, see INS v.
Stevic, 467 U.S. 407, 428 n.22 (1984); Diggs, 555 F.2d at 851;
see also Frolova, 761 F.2d at 374; or
• the treaty imposes substantive obligations that would
contravene a provision of the Constitution, see Reid v. Covert,
354 U.S. 1, 16 (1957) (plurality opinion).
In recent years, courts have hesitated to find a treaty self-
executing – perhaps because the practical effect of finding a
treaty self-executing is to eliminate the House of
Representatives from the law-making process, even for laws
5
that may have significant domestic impact. Cf. U.S. CONST. art.
I, § 1 (“All legislative Powers herein granted shall be vested in
a Congress of the United States, which shall consist of a Senate
and House of Representatives.”); AKHIL REED AMAR,
AMERICA’S CONSTITUTION: A BIOGRAPHY 304 (2005) (“The
general intuition behind this doctrine [of non-self-execution] is
that some things cannot be done domestically unless the
people’s House concurs.”); Jack L. Goldsmith, The New
Formalism in United States Foreign Relations Law, 70 U.
COLO. L. REV. 1395, 1429 & n.126 (1999) (“In recent years
courts” have adopted approach that “presumes that a treaty is
non-self-executing.”); cf. also United States v. Emuegbunam,
268 F.3d 377, 389 (6th Cir. 2001) (“[C]ourts presume that the
rights created by an international treaty belong to a state and
that a private individual cannot enforce them.”); Garza v.
Lappin, 253 F.3d 918, 924 (7th Cir. 2001) (“[A]s a general rule,
international agreements, even those benefitting private parties,
do not create private rights enforceable in domestic courts.”).
Applying the settled precedents and principles for
determining the status of treaties, the migratory bird
conventions plainly are non-self-executing. First, the text of the
migratory bird conventions contemplates implementing
legislation. See Convention for the Protection of Migratory
Birds, U.S.-Gr. Brit., art. VIII, Aug. 16, 1916, 39 Stat. 1702,
1704 (United States and Canada agreed “to take, or propose to
their respective appropriate law-making bodies, the necessary
measures for insuring the execution of the present
Convention.”); Convention for the Protection of Migratory
Birds and Game Mammals, U.S.-Mex., art. II, Feb. 7, 1936, 50
Stat. 1311, 1312 (United States and Mexico agreed “to establish
laws, regulations and provisions to satisfy the need” for
migratory bird protection). Second, the Canada and Mexico
conventions contain pledges to enact restrictions on hunting and
killing migratory birds; they do not create any private right of
6
action.
***
In sum, even if the amended Migratory Bird Treaty Act is
ambiguous, the canon against interpreting an ambiguous statute
to abrogate a treaty should not apply here because the migratory
bird conventions are non-self-executing.