28 U.S.C. § 2253 — Appeal

(a) A final order in a habeas corpus proceeding or a proceeding under section 2255 before a district judge may be reviewed on appeal by the court of appeals for the circuit where the proceeding was held. (b) There is no right to appeal a final order testing the validity of a warrant to remove to another district or place for commitment or trial a person charged with a federal crime, or testing that person's detention while removal is pending. (c)(1) Unless a circuit justice or judge issues a certificate of appealability, no appeal may be taken to the court of appeals from (A) the final order in a habeas proceeding where the complained-of detention arises from process issued by a State court, or (B) the final order in a section 2255 proceeding. (2) A certificate may issue only if the applicant makes a substantial showing that a constitutional right was denied. (3) The certificate must identify the specific issue or issues that meet that requirement.