Shelly Mashek pled guilty to a one-count information charging her with knowingly making available her residence for the purpose of manufacturing methamphetamine in violation of 21 U.S.C. § 856. She appeals the decision of the district court denying her a two-level reduction based on U.S.S.G. § 201.1(b)(6). U.S. SENTENCING GUIDELINES MANUAL § 2D1.1(b)(6) (2003). The district court held that the two-level reduction is inapplicable to a sentence based on a conviction under 21 U.S.C. § 856 because this offense is not enumerated in the federal sentencing guidelines safety-valve provision, U.S.S.G. § 501.2(a). 1 On appeal, Mashek argues that the plain language of § 2D1.1(b)(6) does not incorporate the safety-valve provision’s limitation to the specific offenses enumerated in § 501.2(a). We agree that the district court erred in calculating the appropriate federal sentencing guidelines range and that this er *1014 ror was not harmless. Therefore, we vacate Mashek’s sentence and remand for resentencing.
1. BACKGROUND
After Mashek’s guilty plea to a charge of knowingly making available her residence for the purpose of manufacturing methamphetamine, in violation of 21 U.S.C. § 856, the district court directed the U.S. Probation Office to prepare a presentence investigation report (PSR), including an initial calculation of Mashek’s guidelines range. Applying U.S.S.G. § 2D1.8, the PSR cross-referenced to § 2D 1.1, which provided for a base offense level of 28. Pursuant to § 2D1.1(b)(6), 2 the PSR recommended a two-level reduction because Mashek met the requirements of § 5C1.2(a)(1)-(5). 3 The Government objected, arguing that the two-level reduction is only available for a defendant who is convicted of one of the offenses enumerated in § 501.2(a). The offense to which Mashek pled guilty, 21 U.S.C. § 856, is not among those enumerated in the safety-valve provision.
The district court upheld the Government’s objection and denied the two-level reduction. The district court then granted a three-level acceptance-of-responsibility reduction, resulting in a total offense level of 25 with a guidelines range of 57 to 71 months. Finally, the district court granted the Government’s U.S.S.G. § 5K1.1 motion for substantial assistance and departed downward from the guidelines range by approximately 20%, effectively reducing Mashek’s total offense level by two levels. With an ultimate offense level of 23 and a sentencing range of 46 to 57 months, the district court sentenced Mashek to 46 months’ imprisonment. Mashek’s timely notice of appeal followed.
II. DISCUSSION
A. Post -Booker Appellate Review
We now know that relying on judicial fact-finding to impose a sentence under mandatory sentencing guidelines violates the Sixth Amendment.
United States v. Booker,
— U.S. —, —,
Mashek does not argue that her sentence, pronounced under a mandatory guidelines system, is unconstitutional in light of
Booker.
Instead, Mashek only challenges the district court’s interpretation and application of the relevant guidelines provision, § 2D1.1. However, we apply
Booker’s
remedial holdings to all cases pending on direct review.
Booker,
Under the sentencing scheme that survives
Booker,
both the defendant and the Government retain the statutory right to challenge on appeal the district court’s interpretation or application of the guidelines. 18 U.S.C. §§ 3742(a), (b). “If the court of appeals determines that ... the sentence was imposed in violation of law or imposed as a result of an incorrect application of the sentencing guidelines, the court shall remand the case for further sentencing proceedings with such instructions as the court considers appropriate.” 18 U.S.C. § 3742(f)(1);
see also Booker,
Given the statutory mandate to review the district court’s interpretation and application of the guidelines independently of the reasonableness of the sentence, we must now determine the appropriate standard of review for such an inquiry. By excising subpart (e) from § 3742, the Supreme Court eliminated the familiar statutory standards of review for sentences imposed under the guidelines. The Supreme Court partially
*1016
filled the resulting void when it concluded that sentences should be reviewed for reasonableness in light of § 3553(a). The Supreme Court did not, however, announce a standard for reviewing the legal conclusions inherent in the district court’s application of the advisory guidelines.
4
To fill this remaining void, we, like the Supreme Court, look to the implications of the remaining statutory provisions and to experience from past practices of appellate courts.
Booker,
In deciding that a sentence must be reviewed for reasonableness, the Supreme Court looked to appellate practices prior to the PROTECT Act, Pub.L. 108-21, § 401(d)(1), 117 Stat. 670 (2003).
Booker,
We see no reason to deviate in this one instance from our normal practice of reviewing de novo a district court’s legal conclusions. We would expect that if the Supreme Court intended to change fundamentally the manner in which we review a district court’s legal conclusions, even in just one circumstance, it would have said so explicitly.
See Villegas,
In summary, post-Booker review of a timely raised challenge to the district court’s interpretation and application of
*1017
the guidelines is a two-step process.
Cf. Mathijssen,
Of course, we continue to apply ordinary prudential doctrines to guidelines calculations. For instance, there may be situations where an error in calculating the appropriate guidelines range is harmless and, therefore, does not require immediate remand.
See Williams,
If we determine that the district court correctly calculated the applicable guidelines range, we then reach the second step of our analysis, a review of any challenge to the reasonableness of the sentence in light of § 3553(a).
7
Booker,
B. Review of Mashek’s Sentence
With respect to the matter on appeal here, we must first determine whether the district court imposed Mashek’s sentence based on an erroneous understanding of § 2Dl.l(b)(6). Our analysis begins by reviewing de novo the district court’s application of § 2D 1.1 (b)(6). We conclude that the district court erred by refusing to grant Mashek the two-level reduction under § 2Dl.l(b)(6). Because we hold that this incorrect application of the guidelines was not harmless, we must remand the case pursuant to 18 U.S.C. § 3742(f)(1). Therefore, we need not proceed to the second step of the analysis, a determination of whether the sentence, including the extent of the district court’s § 5K1.1 departure, is reasonable in light of § 3553(a).
The appropriate guidelines provision for a defendant convicted of a violation of 21 U.S.C. § 856 is § 2D1.8. That provision in turn directs the district court to § 2D1.1, where a defendant may qualify for a two-level reduction if 'she “meets the criteria set forth in subdivisions (1) to (5) of subsection (a) of § 5C1.2.” U.S.S.G. § 2D1.1(b)(6). Section 5C1.2(a) allows for a sentence below a statutory mandatory minimum sentence where the defendant meets the five criteria listed in subdivisions (1) to (5), but only for a defendant convicted under 21 U.S.C. § 841, 844, 846, 960 or 963.
Mashek argués that, by its terms, § 2D1.1(b)(6) does not limit the applicability of the two-level reduction' to the offenses enumerated in § 501.2(a). In other words, she argues that § 501.2(a) addresses a situation where the district court may bypass a statutory mandatory minimum sentence, while § 2D1.1(b)(6) merely incorporates the five criteria of § 501.2(a) in order to provide a two-level reduction based on a specific offense characteristic. 8
The Government’s argument that the two-level reduction is limited to the enumerated offenses relies primarily on
United States v. Koons,
Though the Koons Court did not specifically cite the two-level reduction under § 2Dl.l(b)(6), the Government argues that the Court must have held that Koons was not entitled to a two-level reduction under § 2Dl.l(b)(6) because the lower end of Koons’s guidelines range exceeded the statutory mandatory minimum five-year *1019 sentence, thereby making the § 5C1.2(a) safety-valve provision irrelevant. On its face, there is some appeal to the Government’s interpretation. A review of the ease and the Government’s brief in that case, however, does not support this conclusion.
Koons was convicted of distributing methamphetamine within 1,000 feet of a public playground in violation of 21 U.S;C. § 860. The appropriate guidelines provision is U.S.S.G. § 2D1.2 which, like § 2D1.8, contains a cross-reference to § 2D1.1. Therefore, the two-level reduction available under § 2D1.1(b)(6) was a consideration in the calculation of Koons’s offense level. We notice, however, that neither the
Koons
opinion nor the Government’s brief in
Koons
mentions a two-level reduction.
See
Brief for Appellee,
United States v. Koons,
In reaching our conclusion, we find
Koons’s
citation to other circuits’ case law noteworthy. All three cases cited by the
Koons
Court in support of its holding involved defendants seeking sentences below the statutory mandatory minimum.
See United States v. Anderson,
By contrast, the
Koons
Court did not cite the only case to deal directly with the availability Of a § 2D1.1(b)(6) two-level reduction for those convicted under 21 U.S.C. § 860. Prior to
Koons,
the Fourth Circuit held that the “plain language of § 2Dl.l(b)(6) ... merely requires that a defendant meet the criteria found in § 5C1.2(l)-(5); it does not limit the defendant’s eligibility for the two-level downward reduction based upon the offense of conviction or otherwise state that the defendant must satisfy any of the other requirements found -in § 5C1.2.”
United States v. Warnick,
*1020
Section 2Dl.l(b)(6) states, “If the defendant meets the criteria set forth in subdivisions (1) — (5) of subsection (a) of § 5C1.2 ..., decrease [the. offense level] by 2 levels.” The plain language of § 2Dl.l(b)(6) does not limit a defendant’s eligibility for the two-level reduction to the offenses enumerated in § 501.2(a).
9
By its terms, § 2Dl.l(b)(6) refers only to the criteria listed in subdivisions (1) through (5) of § 501.2(a).
See United States v. Ashley,
Having determined that the district court erroneously applied the guidelines, we must now determine whether the error is harmless. The district court’s failure to apply correctly the § 2D1.1 two-level reduction resulted in a guidelines range of 57 to 71 months, rather than 46 to 57 months. The grant of a two-level downward departure for substantial assistance then resulted in a range of 46 to 57 months. Though the downward departure caused Mashek to be eventually sentenced within the correct guidelines range, she was effectively denied the benefit of the § 5K1.1 motion. Under these circumstances, where the court granted a § 5K1.1 departure motion, we cannot conclude that the district court would not have intended that Mashek should receive some benefit from her cooperation. Therefore, we conclude that the error was not harmless.
We conclude that Mashek was sentenced as a result of an incorrect application of the guidelines. Because the sentence fails the first step of our analysis, we need not reach the second step, a determination of whether the imposed sentence is reasonable in light of § 3553(a).
See United States v. Gleich,
III. CONCLUSION
For the foregoing reasons, we conclude that the district court calculated Mashek’s offense level based on an incorrect application of the guidelines. Because 18 U.S.C. § 3742(f)(1) requires remand of a sentence that is the result of an incorrect application of the guidelines, we vacate the sentence and remand the case for resentenc-ing consistent with this opinion and the Supreme Court’s opinion in Booker.
Notes
. The guidelines safety-valve provision, § 5C1.2(a), is derived from and identical to the statutory safety-valve provision, 18 U.S.C. § 3553(f).
. Section 2D 1.1 (b)(6) provides, "If the defendant meets the criteria set forth in subdivisions (1) to (5) of subsection (a) of § 5C1.2 ..decrease by 2 levels.”
. Section 5C 1.2(a) provides in relevant part:
[I]n the case of an offense under 21 U.S.C. § 841, § 844, § 846, § 960, or § 963, the court shall impose a sentence in accordance with the applicable guidelines without regard to any statutory minimum sentence, if the court finds that the defendant meets the criteria in 18 U.S.C. § 3553(f)(1)-(5) set forth verbatim below:
(1) the defendant does not have more than 1 criminal history point, as determined under the sentencing guidelines before application of subsection (b) of § 4A1.3
(2) the defendant did not use violence or credible threats of violence or possess a firearm or other dangerous weapon (or induce another participant to do so) in connection with the offense;
(3) the offense did not result in death or serious bodily injury to any person;
(4) the defendant was not an organizer, leader, manager, or supervisor of others in the offense, as determined under the sentencing guidelines and was not engaged in a continuing criminal enterprise, as defined in 21 U.S.C. § 848; and
(5) not later than the time of the sentencing hearing, the defendant has truthfully provided to the Government all information and evidence the defendant has concerning the offense or offenses that were part of the same course of conduct or of a common scheme or plan, but the fact that the defendant has no relevant or useful other information to provide or that the Government is already aware of the information shall not preclude a determination by the court that the defendant has complied with this requirement.
. The appropriate guidelines range, though now calculated under an advisory system, remains the critical starting point for the imposition of a sentence under § 3553(a).
See Booker,
. Prior to the PROTECT Act, this Court reviewed interpretations and applications of the guidelines de novo,
United States v. Gelinas, 299
F.3d 978, 979 (8th Cir.2002), findings of fact for clear error,
United States v. Waldman,
. In general, there is "nothing in
Booker
that would require the [district] court to determine the sentence in any manner other than the way the sentence would have been determined
pre-Booker." Haack,
. In an opinion dealing with the reasonableness of the extent of a § 5K1.1 departure, a panel of the Court discussed, in dicta, possible situations "where sentencing factors may be so complex, or other § 3553(a) factors may so predominate, that the determination of a precise sentencing range may not be necessary or practical."
Haack,
. An imprecise use of the term "safety-valve provision" can create confusion. We have previously recognized that "safety-valve relief is intended to avoid imposition of mandatory minimum sentences."
United States v. Anton,
. Conversely, the two-level reduction is not available for every conviction of one of the enumerated offenses. For example, a defendant convicted of a violation of 21 U.S.C. § 841(c)(2) is sentenced under U.S.S.G. § 2D1.11. As we noted in
Anton,
even where a defendant meets the criteria of § 5C1.2(a)(1)-(5), the two-level reduction is not available under § 2D1.11.
Anton,
