Tex. Natural Resources Code § 191.133: ENTRY WITHOUT CONSENT.

No person who is not the owner, and does not have the consent of the owner, proprietor, lessee, or person in charge, may enter or attempt to enter on the enclosed land of another and intentionally injure, disfigure, remove, excavate, damage, take, dig into, or destroy any historical structure, monument, marker, medallion, or artifact, or any prehistoric or historic archeological site, American Indian or aboriginal campsite, artifact, burial, ruin, or other archeological remains located in, on, or under any private land within the State of Texas.

Acts 1977, 65th Leg., p. 2688, ch. 871, art. I, Sec. 1, eff. Sept. 1, 1977.