Petitioner-Appellant David Wottlin appeals the district court’s dismissal of his 28 U.S.C. § 2241 habeas petition challenging the Bureau of Prisons’ application of 28 C.F.R. § 550.58 to him and thereby rendering him ineligible for early release following his successful completion of a drug-abuse treatment program while in custody. We affirm the judgment of the district court.
I. FACTUAL & PROCEDURAL BACKGROUND
In 1993, Petitioner-Appellant David Wott-lin was convicted of possession of methamphetamine with intent to distribute, and he was sentenced to seventy months in prison. In April 1994, Wottlin began a comprehensive drug-abuse treatment program (the Program) at the Federal Correctional Institution in Bastrop, Texas (FCI Bastrop). He asserts that before he entered the Program, FCI Bastrop officials indicated that if he completed it he would be eligible for early release pursuant to pending legislation that they believed Congress would soon pass. Wottlin admits, however, that subsection (e) of 18 U.S.C. § 3621, which authorized discretionary early release for prisoners that have completed a comprehensive drug-abuse treatment program, was not added to the statute until after he entered the Program. See 18 U.S.C. § 3621(e).
Wottlin completed the Program in March 1995, and Bureau of Prisons (BOP) officials thereafter denied his request for early release, explaining that he was not eligible because a new BOP regulation, enacted pursuant to § 3621(e), provided that an inmate who has “a prior conviction for homicide, forcible rape, robbery, or aggravated assault” was not eligible for early release under § 3621(e). 28 C.F.R. § 550.58. Wottlin was convicted of armed robbery in 1965.
Thereafter, Wottlin filed a § 2241 petition challenging the BOP’s refusal to grant him early release. He contended that he was entitled to be released one year early pursuant to § 3621(e)(2)(B) and that the BOP, by enacting 28 C.F.R. § 550.58, which excluded him from eligibility for early release, had violated his constitutional rights under the Equal Protection, Due Process, and Ex Post Facto Clauses. He also argued that § 550.58 represented an erroneous administrative interpretation of § 3621(e).
Without requiring Respondent-Appellee Warden Lester Fleming to answer, a magistrate judge issued a report recommending that Wottlin’s petition be dismissed, finding that the BOP had not abused its discretion in promulgating regulations construing § 3621(e) to exclude inmates who had previously been convicted of certain violent felonies from early-release eligibility. The magistrate judge also concluded that Wottlin’s constitutional challenges were' meritless.
Wottlin thereafter filed objections to the magistrate judge’s recommendation, but the district court adopted the recommendation and dismissed Wottlin’s petition. Wott-lin timely filed notice of appeal, and the magistrate judge granted him permission to proceed in forma pauperis. 1
II. DISCUSSION
Wottlin raises several issues on appeal. First, he argues that the BOP’s interpretation of 18 U.S.C. § 3621(e)(2)(B), as embodied in 28 C.F.R. § 550.58, is incorrect and an abuse of discretion. Second, he raises three challenges to the application of § 550.58 to him, claiming that it violates his rights to due process and equal protection, and that it violates the Ex Post Facto Clause of the Constitution.
*1035 A. Promulgation of 28 C.F.R. § 550.58
Wottlin first argues that the BOP’s interpretation of 18 U.S.C. § 3621(e)(2), as embodied in 28 C.F.R. § 550.58, is an abuse of discretion. He contends that in reviewing this issue the district court improperly bypassed the first step of the analysis required by the Supreme Court’s decision in
Chevron U.S.A., Inc. v. Natural Resources Defense Council, Inc.,
Wottlin’s argument relies on subsection (e) of § 3621, which was enacted as part of the Violent Crime Control and Law Enforcement Act of 1994, and which he claims entitles him to early release:
(A) Generally. — Any prisoner who, in the judgment of the Director of the [BOP], has successfully completed a program of residential substance abuse treatment provided under paragraph (1) of this subsection, shall remain in the custody of the [BOP] under such conditions as the [BOP] deems appropriate____
(B) Period of Custody. — The period a prisoner convicted of a nonviolent offense remains in custody after successfully completing a treatment program may be reduced by the [BOP], but such reduction may not be more than one year from the term the prisoner must otherwise serve.
18 U.S.C. § 3621(e)(2). Effective May 25, 1995, the BOP issued regulations governing substance-abuse treatment programs which state that an inmate
who completes a residential drug abuse treatment program ... during his or her current commitment may be eligible ... for early release by a period not to exceed 12 months. The following categories of inmates are not eligible: ... inmates who have a prior conviction for homicide, forcible rape, robbery, or aggravated assault.
28 C.F.R. § 550.58.
We review regulations such as § 550.58 under the two-step standard set out by the Supreme Court in
Chevron:
We look first to the intent of Congress, and if it is clear, “that is the end of the matter; for the court, as well as the agency, must give effect to the unambiguously expressed intent of Congress.”
Chevron,
Wottlin contends that the plain language of § 3621(e)(2)(B) is unambiguous in that it makes inmates whose current convictions are for nonviolent offenses eligible for sentence reductions. In fact, the plain language of § 3621(e)(2)(B) states only that the sentence of a prisoner convicted of a “nonviolent offense” who has completed a drug-abuse treatment program “may be reduced by the Bureau of Prisons.” 28 U.S.C'. § 3621(e)(2)(B) (emphasis added). Thus, § 3621(e)(2)(B) explicitly leaves sentence reductions to the discretion of the BOP.
Wottlin next argues that the BOP must exercise its discretion individually as to each and every inmate whose sentence “may be reduced” under § 3621(e)(2)(B). This argument ignores the possibility that Chevron permits the BOP to exercise its discretion as to categories of inmates by eliminating them from consideration in a properly-promulgated regulation such as § 550.58.
Although this case presents an issue of first impression in this circuit, at least two other circuits have considered it and have concluded that § 550.58 is a reasonable regulation.
See Stiver v. Meko,
[t]he [BOP] in the exercise of its discretion in administering the early release element of the residential drug abuse treatment program, has imposed an additional qualification: prisoners’ non-conviction of certain enumerated past violent offenses, in addition to the requirement that the present conviction be for a non-violent offense. It was not attempting to, and has not interpreted the phrase “convicted for a violent offense” in a manner at odds with Congress’s intended meaning....
We agree with the Ninth and Third Circuits’ analysis of this issue, and we therefore find that the BOP did not abuse its discretion in promulgating 28 C.F.R. § 550.58, thereby precluding Wottlin from obtaining an early release pursuant to § 3621(e).
B. Constitutional Claims
Wottlin raises three constitutional claims, arguing that the application of § 550.58 to him deprives him of his rights to due process and equal protection and that it violates the Ex Post Facto Clause. We address each of these claims in turn.
Wottlin first contends that BOP Program Statement 5330.10 contains “mandatory” language that grants him a due-process liberty interest in early release. This claim lacks merit. “A regulation may create a protected liberty interest if it uses mandatory language to place a substantive limit on official discretion.”
United States v. Tubwell,
Wottlin next contends that § 550.58’s exclusion of him from eligibility for early release violates his right to equal protection because “he is being treated differently than other similarly situated prisoners who have been granted sentence reduction eligibility and .consequently sentence reduction.” Wottlin argues that § 550.58 should be subjected to strict scrutiny because it denies him a fundamental right and because, “[f]or purposes of sentence reduction eligibility, ... [it] create[s] two classes of persons.” This argument lacks merit.
Strict scrutiny is appropriate only where a government classification implicates a suspect class or a fundamental right.
City of Cleburne, Tex. v. Cleburne Living Ctr.,
As the Ninth Circuit explained in addressing a similar challenge to § 550.58’s use of a categorical rule, “By promulgating a reasonable categorical rule, the [BOP] ensures predictability and consistency in administration of the one-year sentence reduction program. Were the [BOP] precluded from issuing such rules to guide its discretion, petitioners would no doubt complain about the [BOP’s] standardless decisionmak-ing.”
Jacks,
Lastly, Wottlin claims that the BOP’s application of § 550.58 to him violates the Ex Post Facto Clause of the Constitution. He contends that § 550.58 is retroactive as applied to him because, until the time that he completed the Program, the BOP determined sentence reduction eligibility under § 3621(e) based on whether an inmate’s current sentence was the result of a conviction for a crime of violence.
The Supreme Court has indicated that “the constitutional prohibition on
ex post facto
laws applies only to penal statutes which disadvantage the offender affected by them.”
Collins v. Youngblood,
the focus of the ex post facto inquiry is not on whether a legislative change produces some ambiguous sort of “disadvantage,” nor ... on whether an amendment affects a prisoner’s “opportunity to take advantage of provisions for early release,” but on whether any such change alters the definition of criminal conduct or increases the penalty by which a crime is punishable.
California Dep’t of Corrections v. Morales,
Wottlin nevertheless contends that the Supreme Court’s decision in
Lynce v. Mathis,
— U.S. - — ,
Pursuant to § 3621(e)(2)(B), Wottlin’s eligibility for the early release program has always been subject to the discretion of the BOP.
See
18 U.S.C. § 3621(e)(2)(B) (“The period a prisoner convicted of a nonviolent offense remains in custody after successfully completing a treatment program
may
be re
*1038
duced by the [BOP]____” (emphasis added)). Section 550.58 is merely a categorical determination by the BOP that it will not exercise that discretion in the case of inmates with a prior conviction for certain specified crimes.
Cf. Hallmark v. Johnson,
Although the question of whether the application of § 550.58, to a prisoner who underwent drug treatment prior to its promulgation violates the Ex Post Facto Clause is a question of first impression in this circuit, in Stiver the Third Circuit determined that the application of § 550.58 to an inmate in precisely the same situation presented in this ease did not violate the Ex Post Facto Clause. The court explained,
Stiver suffers no disadvantage as a result of the regulation. His sentence began in 1992, before section 3621(e)(2)(B) was enacted. At that time he could not have been eligible for a one-year sentence reduction for. completing a substance abuse program, because the enabling statute did not yet exist. Today, under 28 C.F.R. § 550.58, he is still ineligible for sentence reduction. The fact that he arguably was eligible for early release during the period between the enactment of section 3621(e)(2)(B) and the Bureau’s adoption of 28 C.F.R. § 550.58 is irrelevant.
Stiver,
III. CONCLUSION
For the foregoing reasons, we AFFIRM the judgment of the district court.
Notes
. On September 8, 1997, Wottlin was released to the Cornell Corrections Halfway House in Houston, Texas. For purposes of habeas relief, Wott-lin remains "in custody.”
Cf. Ojo v. INS,
