concurring in the judgment.
In sentencing Wayne Jeffers for his involvement in the importation of 6.5 kilograms of cocaine, the able district judge who presided over Jeffers’ trial concluded that he could not “in good conscience” give the defendant safety valve consideration in light of his prior perjury. In so ruling, the judge suggested that safety valve relief was “discretionary,” and that he was not required to grant it in Jeffers’ case. This presents us with two questions: (1) whether prior perjury necessarily disqualifies an individual from safety valve consideration; and (2) if not, whether a district court retains any discretion in applying the safety valve in such a case. Like my colleagues, I answer the first question in the negative and agree to vacate the judgment and to remand the case for further proceedings. Unlike my colleagues, however, I think the answer to the second question differs depending on whether the relief demanded arises under the statutory safety valve provision, 18 U.S.C. § 3553(f)— which was not at issue in Jeffers’ case — or a safety valve-related guideline, U.S.S.G. § 2Dl.l(b)(6) — which was. I write separately to explain why I think a district judge retains discretion to depart from *104U.S.S.G. § 2Dl.l(b)(6) when presented with unusual circumstances that take a case outside that guideline’s heartland.
The term “safety valve” is frequently used by courts and lawyers to refer collectively to 18 U.S.C. § 3553(f), U.S.S.G. § 5C1.2, and U.S.S.G. § 2D1.1(b)(6). In fact, there are important distinctions among the three provisions that affect the degree of discretion a district judge has in applying each. Specifically, 18 U.S.C. § 3553(f), enacted as part of the Mandatory Minimum Sentencing Reform Act of 1994, Pub.L. No. 103-322, tit. VIII, § 80001(a), 108 Stat. 1796, 1985-86, represents a clear congressional choice to exempt certain low-level drug defendants from the mandatory minimum sentences outlined in 21 U.S.C. § 841(b) and to permit their cases to be reviewed pursuant to the somewhat-more-flexible sentencing guidelines. See United States v. Reynoso, 239 F.3d 143, 148 (2d Cir.2000) (reviewing the legislative history of § 3553(f)). By its express terms, the statute is mandatory: a court “shall impose” sentence pursuant to the guidelines rather than the statutory mínimums if a defendant satisfies five specific criteria. See 18 U.S.C. § 3553(f)(1)-(5) (set forth in note 2 of the Court’s opinion). Both the statute’s mandate and its criteria are repeated almost verbatim in U.S.S.G. § 5C1.2, the statute’s implementing guideline. U.S.S.G. § 2D1.1(b)(6), on the other hand, has no congressional pedigree. Promulgated by the Sentencing Commission at the same time as U.S.S.G. § 601.2(a), U.S.S.G. § 2D1.1(b)(6) is referred to as part of the safety valve because it borrows the five criteria of U.S.S.G. § 501.2(a) (themselves derived from 18 U.S.C. § 3553(f)), to identify those low-level drug defendants whose quantity-driven base offense levels should be decreased by two.1
Our review of the District Court’s decision to deny Jeffers a § 2Dl.l(b)(6) guideline adjustment based on trial perjury necessarily begins with the fifth safety valve criterion, which requires that “not later than the time of the sentencing hearing,” a defendant truthfully provide to the government all information he has concerning or relating to his criminal conduct. 18 U.S.C. § 3553(f)(5); U.S.S.G. § 5C1.2(a)(5). We considered this criterion in United States v. Schreiber, 191 F.3d 103 (2d Cir.1999), a case in which the defendant was denied § 3553(f) relief based on a string of false proffers to prosecutors, and there concluded that “lies and omissions do not disqualify a defendant from safety valve relief so long as the defendant makes a complete and truthful proffer not later than the commencement of the sentencing hearing,” id. at 108-09. The District Court sought to distinguish Jeffers’ case from Schreiber, observing that “perjury ... is more than just a lie, perjury is a defendant having committed a crime, a felony in court.” No one could quarrel with this stern view of perjury. Nevertheless, because we are bound by Schreiber, which itself involved felonious lies, albeit told outside the courtroom, see 18 U.S.C. § 1001, I am reluctantly compelled to join my colleagues in concluding that trial perjury does not by itself prevent a defendant from satisfying the fifth safety valve criterion.2
*105Our conclusion that perjury does not foreclose satisfaction of the safety valve’s fifth criterion leaves open the question of whether the unusual circumstances of Jef-fers’ belated proffers, made only after his perjurious attempt to avoid conviction had failed, are sufficiently outside the heartland of U.S.S.G. § 2Dl.l(b)(6) to support a guideline departure. My colleagues choose not to reach this issue. They do, however, note their disagreement with the District Court’s suggestion “that safety valve relief is discretionary even where the statutory criteria are satisfied.” [See ante at 100]. Because I am concerned that this may create some confusion as to the proper scope of proceedings on remand, I would distinguish the statutory relief provided in 18 U.S.C., § 3553(f) from the guideline adjustment provided in U.S.S.G. § 2Dl.l(b)(6) and acknowledge a district court’s discretion to depart from the guideline in unusual circumstances.
My colleagues derive their rejection of the District Court’s reference to safety valve discretion from the statutory requirement of 18 U.S.C. § 3553(f), reiterated in U.S.S.G. § 5C1.2(a), that district courts “shall impose” sentences pursuant to the guidelines rather than the mandatory mínimums if a defendant satisfies the five safety valve criteria. From this language, which is not found in U.S.S.G. § 2Dl.l(b)(6),3 they reach a conclusion *106with which I do not quarrel, i.e., if the five criteria are satisfied, a “court is required to disregard any mandatory minimum in imposing sentence.” [See ante at 100]. But the issue in Jeffers’ case was never whether the defendant should receive a mandatory minimum rather than guideline sentence. Indeed, Jeffers’ guideline range far exceeded the mandatory minimum provided in 21 U.S.C. § 841(b)(1)(A), so the relief provided by 18 U.S.C. § 3553(f) was meaningless to him. The single safety valve issue in Jeffers’ case was whether the District Court was required to award a two-level adjustment pursuant to U.S.S.G. § 2Dl.l(b)(6) despite defendant’s trial perjury, or whether it had any discretion to depart from this guideline. Because § 3553(f)’s mandate to ignore statutory mínimums simply does not speak to this question, it cannot resolve the issue of district court discretion to depart from U.S.S.G. § 201.1(b)(6) in Jeffers’ case.
For that answer, it is necessary to look to the Sentencing Guidelines Manual. There, the Sentencing Commission explains that “each guideline” is intended to “carv[e] out a ‘heartland,’ a set of typical cases embodying the conduct that each guideline describes.” U.S. Sentencing Guidelines Manual ch. 1, pt. A, subpt 4(b). In “an atypical case, one to which a particular guideline linguistically applies but where conduct significantly differs from the norm, the court may consider whether a departure is warranted.” Id. This discretion to depart from the guidelines in appropriate cases is expressly referenced by Congress in 18 U.S.C. § 3553(b), which states that a “court shall impose a sentence of the kind, and within the range” provided in the guidelines “unless the court finds that there exists an aggravating or mitigating circumstance of a kind, or to a degree, not adequately taken into consideration by the Sentencing Commission in formulating the guidelines.” See Koon v. United States, 518 U.S. 81, 93-96, 116 S.Ct. 2035, 135 L.Ed.2d 392 (1996) (recognizing district court discretion to depart from the guidelines in atypical cases outside the heartland considered by the Sentencing Commission in formulating each guideline). Thus, we have previously held that “absent express prohibition,” a sentencing court applying the guidelines “is free to consider, in an unusual case, whether or not the factors that make it unusual ... are present in sufficient kind or degree to warrant a departure.” United States v. Tenzer, 213 F.3d 34, 43 (2d Cir.2000) (quoting United States v. Core, 125 F.3d 74, 77 (2d Cir.1997) (quoting United States v. Rivera, 994 F.2d 942, 949 (1st Cir.1993) (Breyer, C.J.))); see United States v. Adelman, 168 F.3d 84, 86-87 (2d Cir.1999) (approving upward departure where threatening communications guideline did not consider multiple victim scenario).
Applying these principles to U.S.S.G. § 2D1.1(b)(6) yields two conclusions: (1) that guideline may “linguistically appl[y]” to every case in which a defendant satisfies the five safety valve criteria set forth in 18 U.S.C. § 3553(f) and U.S.S.G. § 5C1.2(a); nevertheless (2) because there is no express prohibition, district courts remain free to depart when an atypical case falls outside § 2D1.1(b)(6)’s heartland. See also U.S.S.G. § 5K2.0 (Policy Statement) (“Any case may involve factors in addition to those identified that have not been given adequate consideration by the Commission.”).
An example helps to illustrate the point. The first safety valve criterion uses criminal history to ensure that safety valve relief is afforded only to low-level drug *107defendants: a defendant cannot “have more than 1 criminal history point, as determined under the sentencing guidelines.” 18 U.S.C. § 3558(f)(1); U.S.S.G. § 501.2(a)(1). The guidelines, however, do not award criminal history points for foreign convictions. See U.S.S.G. § 4A1.2(h). Thus, a defendant with a significant record for drug trafficking outside the United States might still have only 0-1 criminal history points and technically qualify for safety valve consideration. In such a case, the mandatory language of 18 U.S.C. § 3553(f) may well require a court to use the guidelines rather than the statutory minimums in calculating that defendant’s sentence (assuming he satisfies the other four criteria), but, once a case is within the guidelines, the court should be able to consider whether the foreign convictions were so numerous or serious as to take the defendant outside the heartland of § 2D1.1(b)(6). See generally U.S.S.G. § 4A1.3 (Policy Statement) (recognizing propriety of criminal history departure where guidelines’ failure to consider foreign convictions inadequately reflects risk of defendant’s recidivism).
The same analysis pertains to the fifth safety valve criterion. Sehreiber holds that it linguistically applies even to a defendant who chronically lies to the government as long as he proffers truthfully before the start of his sentencing hearing. 191 F.3d at 108-09. It is most unlikely, however, that the Commission envisioned such a scenario when it provided for an offense level adjustment in U.S.S.G. § 2D1.1(b)(6). Even more atypical — one hopes — would be a case such as Jeffers’ where a defendant boldly perjures himself at trial and only after failing to avoid conviction makes a belated safety valve proffer to the government. As we observed in United States v. Reynoso, Congress’s intent in enacting the statutory safety valve, 18 U.S.C. § 3553(f), was “to provide relief ... to those defendants who, but for their minor roles in criminal activity, could (and would) have provided the Government with substantial assistance,” 239 F.3d at 148 (emphasis in original). By adopting the same criteria in U.S.S.G. § 2Dl.l(b)(6), the Commission signaled its intent to afford relief to the same persons. A defendant who perjures himself at trial would not likely fall within this heartland for, in such a case, it would not be simply the defendant’s low-level role that precluded him from providing the government with substantial assistance; it would be his own willful, indeed, criminal conduct in obstructing justice in the one case about which he did have significant information, i.e., his own.
In other contexts, the guidelines already recognize that perjury is relevant to sentencing and can support both an offense level enhancement for obstruction of justice under U.S.S.G. § 3C1.1 and denial of acceptance of responsibility consideration under U.S.S.G. § 3E1.1. See Application Note 4 to U.S.S.G. § 3E1.1 (“Conduct resulting in an enhancement under § 3C1.1 ... ordinarily indicates that the defendant has not accepted responsibility for his criminal conduct.”); see also United States v. Echevarria, 33 F.3d 175, 179 (2d Cir. 1994) (rejecting double counting challenge to district court’s reliance on same false statements to support § 3C1.1 enhancement and § 3E1.1 denial). It is entirely consistent with this reasoning to acknowledge district court discretion to consider whether the circumstances of a defendant’s perjury and his belated truthful proffer are so outside the safety valve heartland as to support a departure from U.S.S.G. § 2D1.1(b)(6). See United States v. Campbell, 967 F.2d 20, 25 (2d Cir.1992) (holding that defendant’s single act may be relevant to different guideline considerations).
*108At first glance, it may seem curious that on the same facts a court would be obliged to grant relief under 18 U.S.C. § 3553(f) yet retain discretion to depart from U.S.S.G. § 2D1.1(b)(6). There is, however, an interesting irony in the mandate of § 3553(f) that explains the seeming incongruity. In essence, what Congress mandates in § 3553(f) is not a restriction on district courts’ sentencing discretion, but rather a restoration of some measure of the discretion formerly removed by the mandatory minimum terms in 21 U.S.C. § 841(b). Viewed in this light, Schreiber’s strict construction of the safety valve’s fifth criterion promotes Congress’s intent to bring a significant number of mandatory minimum cases back within the guideline scheme. Nothing in Schreiber or 18 U.S.C. § 3553(f), however, suggests an intent to limit a district court’s discretion within the guideline scheme to consider whether prior lies, a history of foreign convictions, or any other unusual factor, takes a case outside the heartland. See generally United States v. Schreiber, 191 F.3d at 106 (noting district court’s view that but for mandatory mínimums, totality of circumstances would warrant departure from guidelines and imposition of non-in-carceratory sentence).
In sum, I join in that part of the Court’s opinion affirming the District Court’s decision to deny Jeffers guideline adjustments for acceptance of responsibility and minor role. I similarly join in its conclusion that Jeffers’ trial perjury does not, by itself, disqualify him from safety valve eligibility. But I depart from my colleagues’ rejection of district court discretion in the application of safety valve relief. While I agree that the statutory mandate of 18 U.S.C. § 3553(f) compels a court to sentence a defendant who satisfies the safety valve’s five criteria pursuant to the sentencing guidelines without regard to any statutory mínimums, I would nevertheless acknowledge the District Court’s discretion on remand to depart from U.S.S.G. § 2Dl.l(b)(6) if it determines that Jeffers’ trial perjury takes his case outside that guideline’s heartland.
. As we made plain in United States v. Osei, 107 F.3d 101 (2d Cir.1997) (per curiam), U.S.S.G. § 2D1.1(b)(6) operates independently from 18 U.S.C. § 3553(f) and U.S.S.G. § 5C1.2(a), in that its base offense level adjustment is available to defendants who satisfy the five criteria even if they do not face mandatory minimum sentences. Id. at 104.
. To distinguish Jeffers’ perjury from Schreiber 's lies, the District Court relied on United States v. Fletcher, 74 F.3d 49 (4th Cir.1996), which states:
*105At the sentencing hearing, the district court found Fletcher ineligible for the acceptance of responsibility reduction in U.S.S.G. § 3El.l(a) because he perjured himself at trial. The judge determined that Fletcher failed to warrant the reduction despite "coming clean” at sentencing by admitting that he had lied at trial by fabricating an alibi. In light of that ruling, it is not illogical to assume that the judge similarly determined that Fletcher failed to comply with the fifth condition in 18 U.S.C. § 3553(f): that the defendant has truthfully provided to the government all information and evidence he has concerning the offense and others related to it. 18 U.S.C. § 3553(f)(5); U.S.S.G. § 50.2(5).
Id. at 56. My colleagues observe that Fletcher "did not rule that committing perjury automatically disqualifies a defendant from safety valve eligibility; rather, its holding confirms that prior perjurious acts may affect the defendant's credibility and his corresponding ability to satisfy the safety valve's truthful disclosure requirement.” [See ante at 99] (emphasis in original). I am not persuaded that Fletcher speaks so clearly. The Fletcher court's references to "that ruling” and to a "similar[] determin[ation]” in the quoted passage’s last sentence appear to allude back to the district judge's decision to deny Fletcher a § 3El.l(a) adjustment "because he perjured himself at trial” before " 'coming clean' at sentencing.” In this light, I cannot discern from the quoted passage whether trial perjury was (1) a factor the district judge weighed in deciding that Fletcher's post-conviction proffer was not credible, as my colleagues suggest, or (2) the singular reason why Fletcher was denied safety valve consideration (just as he was denied acceptance credit) despite his "coming clean” after conviction.
. Rather than employ the "shall impose” mandate of 18 U.S.C. § 3553(f) and U.S.S.G. § 5C 1.2(a), U.S.S.G. § 2D 1.1 (b)(6) simply states a directive to "decrease” a base offense level if specific criteria are satisfied. Similar directives to increase or decrease offense levels are found throughout the guidelines. See, e.g., U.S.S.G. § 2J1.6(b)(1)(A) (if defendant voluntarily surrendered within 96 hours of time to report, “decrease by 5 levels”); U.S.S.G. § 3A1.1(b)(1) (if defendant knew or should have known of victim's vulnerability, “increase by 2 levels”); U.S.S.G. § 3E1.1 (if defendant accepts responsibility for offense, “decrease the offense level by 2 levels”) (all emphases added).
My colleagues cite to United States v. Osei, 107 F.3d at 103, for its reference to the “apparent mandate of § 2D1.1(b)(4)” (the predecessor to U.S.S.G. § 2D1.1(b)(6)). [See ante at 100-101]. In context, however, the Osei reference suggests simply that the safety valve guideline, like any other, must be applied to all cases that fall within the heartland, whether or not a defendant is subject to a mandatory minimum. United States v. Osei, 107 F.3d at 103-05. Osei did not address the question of whether district courts could depart from *106U.S.S.G. § 2D1.1(b)(6) in cases falling outside the heartland.