#### Scott FIRTH, Petitioner-Appellant, v. Rick RAEMISCH, Executive Director for Colorado Department of Corrections; Cynthia Coffman, Attorney General for Colorado, Respondents-Appellees.

No. 16-1380

United States Court of Appeals, Tenth Circuit.

Filed February 13, 2017

Scott Firth, Pro Se

John J. Fuerst, III, Office of the Attorney General for the State of Colorado, Denver, CO, for Respondents-Appellees

*490Before TYMKOVICH, Chief Judge, KELLY, and MATHESON, Circuit Judges.

ORDER DENYING CERTIFICATE OF APPEALABILITY *

Timothy Mi Tymkovich, Chief Judge

Scott Firth, a Colorado state prisoner, appeals from the district court’s dismissal of his application for a writ of habeas corpus. Firth raised three claims; (1) entitlement to a definite prison term, (2) entitlement to earned-time credits, and (3) entitlement to discretionary parole. The district court concluded that none of the claims has merit. To pursue this appeal, Firth must obtain a certifícate of appeala-bility (COA) from this court. 28 U.S.C. § 2253(c)(1)(A). That, in turn, requires him to make “a substantial showing of the denial of a constitutional right,” 28 U.S.C. § 2253(c)(2), by establishing “that reasonable jurists could debate whether ... the petition should have been resolved in a different manner or that the issues presented were adequate to deserve encouragement to proceed further,” *Slack v. McDaniel,*529 U.S. 473, 484, 120 S.Ct. 1595, 146 L.Ed.2d 542 (2000) (internal quotation marks omitted). He cannot meet these requirements.

We agree with the district court that the first and third claims challenge the *validity*of his sentence rather than the *execution*of it, and so are properly considered under 28 U.S.C. § 2254 rather than 28 U.S.C. § 2241. Regardless of his characterization, Firth’s underlying claim is that he deserves immediate release because his current sentence is illegal. That claim thus challenges the validity rather than the execution of the sentence. *See Davis v. Roberts,*425 F.3d 830, 834 (10th Cir. 2005). As this court turned away his earlier § 2254 application, *see Firth v. Smelser,*403 Fed.Appx. 321, 322 (10th Cir. 2010) (unpublished), Firth must demonstrate entitlement to file a second or successive application, which we can authorize only if a new rule of constitutional law (made retroactive by the Supreme Court) or some new factual predicate has emerged. *See*28 U.S.C. § 2244(b), Because Firth, points to neither here, we deny authorization to file the current application.

We also conclude that reasonable jurists would not disagree with the district court’s dismissal of the earned-time credits claim. As this, court noted in *Fogle v. Pierson,*435 F.3d 1252 (10th Cir. 2006), Colorado law makes earned-time credits discretionary, not mandatory, so prisoners have no entitlement to them. *Id.*at 1262. Nothing in Firth’s brief persuades us that *Fogle*spoke incorrectly. The lack of a constitutionally protected liberty interest in earned-time credits under Colorado law thus precludes federal habeas relief.

We DENY the request for a COA and dismiss this appeal. Further, we DENY Mr. Firth’s motions to certify a question of state law, to interpret questions of law, and for authorization to file a second or successive habeas application. Finally, we DENY the motion to proceed *in forma pawperis*and remind Firth of his obligation to pay the filing fee in full.

*

 After examining the briefs and appellate record, this panel has determined unanimously that oral argument would not materially assist in the determination of this appeal. *See*Fed. R. App. P. 34(a)(2); 10th Cir. R.. 34.1(G), The case is therefore ordered submitted without oral argument. This order is not binding precedent except under the doctrines of law of the case, res judicata, and collateral estoppel. It may be cited, however, for its persuasive value consistent with Fed. R. App. P. 32.1 and 10th Cir. R. 32,1.