IN THE UNITED STATES COURT OF APPEALS
                    FOR THE FIFTH CIRCUIT
                                                                     United States Court of Appeals
                                                                              Fifth Circuit
                                     No. 08-10084
                                                                          FILED
                                   Summary Calendar
                                                                      January 26, 2009

                                                                   Charles R. Fulbruge III
                                                                           Clerk
BRENT M. LAWSON,

                                                  Petitioner-Appellant,

v.

DAVID BERKEBILE, Warden,

                                                  Respondent-Appellee.



                   Appeals from the United States District Court
                        for the Northern District of Texas
                                No. 3:07-CV-1516



Before SMITH, STEWART, and SOUTHWICK, Circuit Judges.
PER CURIAM:*


       Brent Lawson, federal prisoner # 30508-044, petitioned under 28 U.S.C.
§ 2241 challenging the decision of the Bureau of Prisons (“BOP”) to deny him
early release for the reason that he had failed to spend ninety days in a Com-
munity Corrections Center undergoing treatment. The district court dismissed


       *
         Pursuant to 5TH CIR. R. 47.5, the court has determined that this opinion should not
be published and is not precedent except under the limited circumstances set forth in 5TH CIR.
R. 47.5.4.
                                  No. 08-10084

the petition. Lawson moves for leave to proceed in forma pauperis (“IFP”) on ap-
peal to question the denial of IFP status and the certification that his appeal
would not be taken in good faith. See Baugh v. Taylor, 

, 202 (5th
Cir. 1997); 28 U.S.C. § 1915(a)(3); FED. R. APP. P. 24(a)(3).
      Lawson was released from prison in October 2008, while his IFP motion
was pending in this court. He asserts that the case is not moot, however, be-
cause he is still serving a term of supervised release. Although the government
does not address the question, this court is obligated to examine whether it has
jurisdiction. See Dailey v. Vought Aircraft Co., 

, 227 (5th Cir. 1998).
      The possibility that a district court may alter a period of supervised re-
lease—“if it determines that [the defendant] has served excess prison time”—
may keep a § 2241 petition from becoming moot. Johnson v. Pettiford, 

, 918 (5th Cir. 2006) (addressing a federal prisoner’s challenge to the denial
of a sentence credit). Unlike the situation in Pettiford, however, the circum-
stance here is that the district court that denied Lawson’s § 2241 petition is
without jurisdiction to determine, under 18 U.S.C. § 3583, whether he served
excess prison time; that determination is to be made by the sentencing court.
See § 3583(e)(2); 18 U.S.C. § 3605 (authorizing a court to exercise jurisdiction
over a person on supervised release if such jurisdiction has been transferred by
the sentencing court). Lawson was sentenced by a different district court from
the court a quo.
      A pronouncement by this court concerning Lawson’s § 2241 allegations
would not result in “specific relief through a decree of a conclusive character”
with regard to modification of the sentence. North Carolina v. Rice, 

, 246 (1971) (citation and internal quotation marks omitted). And “[b]ecause
federal courts may only hear cases or controversies under Article III, it is uncon-
stitutional for the Court to issue mere advisory opinions.” Carpenter v. Witchita
Falls Indep. Sch. Dist., 

, 368 n.5 (5th Cir. 1995).
      Lawson’s motion would fail even if there were jurisdiction. A movant for

                                        2
                                  No. 08-10084

leave to proceed IFP on appeal must show that he is a pauper and that the ap-
peal is taken in good faith, i.e., that it presents a nonfrivolous issue. See Carson
v. Polley, 

, 586 (5th Cir. 1982). “Frivolous” is defined as “lack[ing]
an arguable basis in law or fact.” Taylor v. Johnson, 

, 472 (5th Cir.
2001). A district court, by providing written reasons certifying that the appeal
is not taken in good faith, may deny a motion for leave to appeal IFP. 

; FED. R. APP. P. 24(a). The appellant may challenge the district
court’s certification decision by filing an IFP motion in this court. 

; FED. R. APP. P. 24(a)(5).
      Lawson had no liberty interest in early release. See Richardson v. Joslin,

, 419-20 (5th Cir. 2007) (stating that the grant of discretion to the
BOP to shorten by a period of up to one year the prison term of a prisoner who
has successfully completed a drug abuse program “indicates that no entitlement
and, hence, no liberty interest, was created”). Nor does Lawson have an argua-
ble equal protection claim. His allegation that he was treated differently from
other prisoners because of BOP authorities’ discriminatory intent is purely con-
clusional and does not suffice to raise a nonfrivolous appellate issue. Mowbray
v. Cameron County, Tex., 

, 278 (5th Cir.2001).
      To the extent that Lawson persists in a contract claim, his appeal on that
issue is also frivolous. The agreement that he signed provided that, if he were
found eligible for early release under § 3621(e), such eligibility was provisional
and subject to change.
      Lawson has not shown that his appeal presents a nonfrivolous issue. Ac-
cordingly, his IFP motion is denied, and his appeal is dismissed as frivolous. See

; 5TH CIR. R. 42.2.
      MOTION TO PROCEED IFP DENIED; APPEAL DISMISSED.




                                         3