(a) The Supreme Court shall exercise the judicial power of the state except as otherwise provided in this Constitution. Its jurisdiction shall be co-extensive with the limits of the State and its determinations shall be final except in criminal law matters. Its appellate jurisdiction shall be final and shall extend to all cases except in criminal law matters and as otherwise provided in this Constitution or by law. The Supreme Court and the Justices thereof shall have power to issue writs of habeas corpus, as may be prescribed by law, and under such regulations as may be prescribed by law, the said courts and the Justices thereof may issue the writs of mandamus, procedendo, certiorari and such other writs, as may be necessary to enforce its jurisdiction. The Legislature may confer original jurisdiction on the Supreme Court to issue writs of quo warranto and mandamus in such cases as may be specified, except as against the Governor of the State.
(b) The Supreme Court shall also have power, upon affidavit or otherwise as by the court may be determined, to ascertain such matters of fact as may be necessary to the proper exercise of its jurisdiction.

Terms Used In Texas Constitution Art. 5 sec. 3

  • Affidavit: A written statement of facts confirmed by the oath of the party making it, before a notary or officer having authority to administer oaths.
  • Appellate: About appeals; an appellate court has the power to review the judgement of another lower court or tribunal.
  • Habeas corpus: A writ that is usually used to bring a prisoner before the court to determine the legality of his imprisonment. It may also be used to bring a person in custody before the court to give testimony, or to be prosecuted.
  • Jurisdiction: (1) The legal authority of a court to hear and decide a case. Concurrent jurisdiction exists when two courts have simultaneous responsibility for the same case. (2) The geographic area over which the court has authority to decide cases.