Texas Civil Practice and Remedies Code - CIV PRAC & REM § 18.033. State Land Records

(a) In a dispute between the State of Texas and an upland owner of property fronting on the Gulf of Mexico and the arms of the Gulf of Mexico within the boundaries of the State of Texas, the maps, surveys, and property descriptions filed in the General Land Office in connection with any conveyance by the state or any predecessor government by patent, deed, lease, or other authorized forms of grant shall be presumed to accurately depict the boundary between adjacent upland owners and the state-owned submerged lands.

(b) This presumption applies only to those surveys conducted by a surveyor duly appointed, elected, or licensed, and qualified.

(c) This presumption may be overcome only on a showing of clear and convincing evidence that the boundary as described and depicted in the archives of the General Land Office is erroneous.