opinion: Per Curiam.
  The Court of Appeals for the Ninth Circuit has certified to this Court the following three questions:
  “(1) Has Congress created in the Court of Appeals, as a court, the jurisdiction to issue a certificate of probable cause, sought from the court, as a court, by the provisions of 28 U. S. C. § 2253, replacing the repealed 28 U. S. C. § 466?
  “(2) If the Supreme Court holds that Congress has not given the Courts of Appeal such jurisdiction, did the Supreme Court create that jurisdiction, by its per curiam opinion, rendered without argument, which failed to consider 28 U. S. C. § 2253 and was based on the repealed 28 U. S. C. § 466 and House v. Mayo, 324 U. S. 42, 48 (1945), and its remand to this court ‘so that the petitioner’s application for a certificate of probable cause may be entertained on its merits’?
  “(3) If the Supreme Court holds that Congress or the Court creates such jurisdiction by 28 U. S. C. § 2253 and that House v. Mayo applies, does its mandate mean that all the judges, as judges, or some individual judge, or the court as a court shall consider the petition for a certificate of probable cause?”
  Earlier this Term we were constrained to find that the Court of Appeals for the Ninth Circuit was in error in deeming itself without jurisdiction to entertain applications for certificates of probable cause, under 28 U. S. C. § 2253, addressed to that court instead of to a judge or judges thereof. Accordingly, we reversed the judgments in these cases. Burwell v. Teets, 350 U. S. 808; Rogers v. Teets, 350 U. S. 809. Each of these cases was reversed “so that the petitioner’s application for a certificate of probable cause may be entertained on its merits.”
  We did not attempt to lay down a procedure for the Court of Appeals to follow for the entertainment of such applications on their merits. We shall not do so now. It is for the Court of Appeals to determine whether such an application to the court is to be considered by a panel of the Court of Appeals, by one of its judges, or in some other way deemed appropriate by the Court of Appeals within the scope of its powers. Cf. Western Pacific R. Corp. v. Western Pacific R. Co., 345 U. S. 247. It is not for this Court to prescribe how the discretion vested in a Court of Appeals, acting under 28. U. S. C. § 2253, should be exercised. See United States v. Rosenburgh, 7 Wall. 580. As long, as that court keeps within the bounds of judicial discretion, its action is not reviewable.
  The entire certificate in each of these cases must be
  Dismissed.
choices: comity: civil rights comity: criminal procedure comity: First Amendment comity: habeas corpus comity: military comity: obscenity comity: privacy comity: miscellaneous comity primarily removal cases, civil procedure (cf. comity, criminal and First Amendment); deference to foreign judicial tribunals assessment of costs or damages: as part of a court order Federal Rules of Civil Procedure including Supreme Court Rules, application of the Federal Rules of Evidence, Federal Rules of Appellate Procedure in civil litigation, Circuit Court Rules, and state rules and admiralty rules judicial review of administrative agency's or administrative official's actions and procedures mootness (cf. standing to sue: live dispute) venue no merits: writ improvidently granted no merits: dismissed or affirmed for want of a substantial or properly presented federal question, or a nonsuit no merits: dismissed or affirmed for want of jurisdiction (cf. judicial administration: Supreme Court jurisdiction or authority on appeal from federal district courts or courts of appeals) no merits: adequate non-federal grounds for decision no merits: remand to determine basis of state or federal court decision (cf. judicial administration: state law) no merits: miscellaneous standing to sue: adversary parties standing to sue: direct injury standing to sue: legal injury standing to sue: personal injury standing to sue: justiciable question standing to sue: live dispute standing to sue: parens patriae standing standing to sue: statutory standing standing to sue: private or implied cause of action standing to sue: taxpayer's suit standing to sue: miscellaneous judicial administration: jurisdiction or authority of federal district courts or territorial courts judicial administration: jurisdiction or authority of federal courts of appeals judicial administration: Supreme Court jurisdiction or authority on appeal or writ of error, from federal district courts or courts of appeals (cf. 753) judicial administration: Supreme Court jurisdiction or authority on appeal or writ of error, from highest state court judicial administration: jurisdiction or authority of the Court of Claims judicial administration: Supreme Court's original jurisdiction judicial administration: review of non-final order judicial administration: change in state law (cf. no merits: remand to determine basis of state court decision) judicial administration: federal question (cf. no merits: dismissed for want of a substantial or properly presented federal question) judicial administration: ancillary or pendent jurisdiction judicial administration: extraordinary relief (e.g., mandamus, injunction) judicial administration: certification (cf. objection to reason for denial of certiorari or appeal) judicial administration: resolution of circuit conflict, or conflict between or among other courts judicial administration: objection to reason for denial of certiorari or appeal judicial administration: collateral estoppel or res judicata judicial administration: interpleader judicial administration: untimely filing judicial administration: Act of State doctrine judicial administration: miscellaneous Supreme Court's certiorari, writ of error, or appeals jurisdiction miscellaneous judicial power, especially diversity jurisdiction