Texas Constitution art. 5 §31

(a) The Supreme Court is responsible for the efficient administration of the judicial branch and shall promulgate rules of administration not inconsistent with the laws of the state as may be necessary for the efficient and uniform administration of justice in the various courts. (b) The Supreme Court shall promulgate rules of civil procedure for all courts not inconsistent with the laws of the state as may be necessary for the efficient and uniform administration of justice in the various courts. (c) The legislature may delegate to the Supreme Court or Court of Criminal Appeals the power to promulgate such other rules as may be prescribed by law or this Constitution, subject to such limitations and procedures as may be provided by law. (d) Notwithstanding Section 1 , Article II, of this constitution and any other provision of this constitution, if the supreme court does not act on a motion for rehearing before the 180th day after the date on which the motion is filed, the motion is denied. (Added Nov. 5, 1985; Subsec. (d) added Nov. 4, 1997.)