Texas Statutes
Subchapter B. Emergency Interim Succession
Section 401.025. Exception

Sec. 401.025. EXCEPTION. The president pro tempore of the senate or speaker of the house of representatives may act as governor under this subchapter only if the person holds that office when the governor and lieutenant governor first become unavailable.
Acts 1987, 70th Leg., ch. 147, Sec. 1, eff. Sept. 1, 1987.