Marvin Lydell Starks, federal prisoner # 35930-180, seeks leave to proceed in for-ma pauperis (IFP) on appeal from the district court’s denial of his 18 U.S.C. § 3582(c)(2) motion to reduce his sentence based on recent amendments to the Sentencing Guidelines relating to offenses involving crack cocaine. He was convicted of possession with intent to distribute *911 crack cocaine within 1000 feet of a school and carrying a firearm during the commission of a drug trafficking crime. By moving to proceed IFP, Starks is challenging the district court’s certification decision that his appeal was not taken in good faith because it is frivolous. See Baugh v. Taylor, 117 F.3d 197, 202 (5th Cir. 1997).

Starks did not file a notice of appeal within the ten-day appeal period in Rule 4(b)(1) of the Federal Rules of Appellate Procedure. This court remanded the case to the district court for a determination of whether the untimely filing of the notice of appeal was due to excusable neglect or good cause. The district court determined that Starks had not shown that the untimely notice of appeal was due to excusable neglect or good cause.

This court can dismiss an appeal if the appeal “is frivolous and entirely without merit.” 5th Cir. R. 42.2. Because Starks did not file a timely notice of appeal, the district court did not err in enforcing the time limitations set forth in Rule 4(b), and this court may not reverse its decision to do so. See United States v. Leijano-Cruz, 473 F.3d 571, 574 (5th Cir. 2006). Because the instant appeal is without arguable merit, Starks’s motion for leave to proceed IFP on appeal is DENIED, and the appeal is DISMISSED as frivolous. See 5th Cir. R. 42.2.