The governor by proclamation may declare any portion of the state where state military forces are serving in aid of the civil authority to be in a state of insurrection, if the governor determines that law and order will be promoted by the declaration.
Tex. Gov't Code § 431.115
STATE OF INSURRECTION
Acts 1987, 70th Leg., ch. 147, Sec. 1, eff
Official source: Texas Constitution and Statutes. Reproduced from public-domain Texas statutes; confirm against the official source for the current text. Not legal advice.