Tex. Parks and Wildlife Code § 31.102: OPERATING BOATS IN RESTRICTED AREAS.

No person may operate a boat within a water area that has been clearly marked, by buoys or some other distinguishing device, as a bathing, fishing, swimming, or otherwise restricted area by the department or by a political subdivision of the state. This section does not apply to a patrol or rescue craft or in the case of an emergency.

Acts 1975, 64th Leg., p. 1405, ch. 545, Sec. 1, eff. Sept. 1, 1975.