ORDER *

These cases involve challenges to Proposition 9, The Victims’ Bill of Rights Act of 2008 (“Marsy’s Law”), see Cal. Const. art. I, § 28; Cal Penal Code §§ 679.026, 3041.5, 3043, 3044, by California prisoners serving indeterminate life sentences with the possibility of parole. Argument in each case was heard on August 12, 2013, and submission was vacated in each case on April 30, 2015, pending this Court’s decision in Gilman v. Brown, No. 14-15613. In the wake of our opinions in Gilman v. Brown, 814 F.3d 1007 (9th Cir. 2016), and Nettles v. Grounds, 830 F.3d 922 (9th Cir. 2016) (en banc), we today resubmit these cases for decision. We have jurisdiction under 28 U.S.C. § 2253, and vacate and remand for identical reasons in each case.

1. In each of these cases, petitioners sought habeas corpus relief under 28 U.S.C. § 2254, arguing that as applied Marsy’s Law violates the Ex Post Facto Clause, U.S. Const. Art. I, §§ 9,' 10,' by impermissibly advancing the dates for parole hearings. None of the petitioners’ claims lies at “the core of habeas corpus,” because petitioners do not challenge the “validity of any confinement or ... the particulars affecting its duration,” Muhammad v. Close, 540 U.S. 749, 750, 124 S.Ct. 1303, 158 L.Ed.2d 32 (2004) (per curiam), but rather only the timing of each petitioner’s next parole hearing. Success on the petitioners’ claims would not necessarily result in a shortening of their sentences. Thus, the district _ court in each case lacked jurisdiction to grant 28 U.S.C. § 2254 habeas relief. Nettles, 830 F.3d at 935-37 (“[A] § 1983 action is the exclusive vehicle for claims brought by state prisoners that are not within the core of habeas corpus.”). The judgments below on the merits of petitioners’ constitutional claims therefore are vacated.

2. On remand, petitioners should be afforded leave to amend their petitions to assert claims under 42 U.S.C. § 1983. Id. (“[A] district court may construe a petition for habeas corpus to plead a cause of action under § 1983 after notifying and obtaining informed consent from the prisoner.”).

3. If any petitioner chooses to amend, the district court should determine in the *698 first instance the impact of Gilman on his claims.

VACATED AND REMANDED. Each party shall bear their own costs.

In No. 10-15412, Borstad’s “Motion to Submit Uncertified Issues on Appeal and on the Grounds of Jurisdiction,” Dkt. No. 5, is DENIED.

In No. 10-15412, Borstad’s “Motion to Submit Intervening United States Supreme Court Law in Support of Request for Certifícate of Appealability,” Dkt. No. 6, is DENIED.

In No. 10-15412, Borstad’s “Request for Judicial Notice,” Dkt. No. 28, is GRANTED.

In No. 11-16355, Appellee’s “Request for Judicial Notice,” Dkt. No. 35, is GRANTED.

In No. 11-16355, Saffold’s “Motion for Judicial Notice,” Dkt. No. 41, is GRANTED.

In No. 11-16355, Appellee’s “Request for Judicial Notice,” Dkt. No. 58, is GRANTED.

In No. 11-16355, Saffold’s “Motion for Order Remanding Matter to District Court” in Saffold v. Hill, No. 11-16355, Dkt. No. 86, is DENIED without prejudice to renewing the request for consolidation in the district court.

In No. 11-16570, Rios’s “Request for Judicial Notice of Evidentiary Hearing and Transcript,” Dkt. No. 16, is GRANTED.

In No. 11-16570, Appellee’s “Request for Judicial Notice,” Dkt. No. 44, is GRANTED.

In No. 11-55308, Appellee’s “Motion to Substitute Party,” Dkt. No. 4, is GRANTED.

In No. 11-55308, Petrich’s “Request for Judicial Notice of Transcript,” Dkt, No. 15, is GRANTED.

In No. 11-55308, Amicus Curiae’s “Notice,” Dkt. No. 47, is DENIED.

In No. 11-55308, Appellee’s “Request for Judicial Notice,” Dkt. No. 49, is GRANTED.