Tex. Natural Resources Code § 21.042: SURVEYOR'S CERTIFICATION.

(a) The surveyor shall certify officially:

(1) to the correctness of the survey;

(2) that the survey was made according to law;

(3) that the survey was actually made in the field; and

(4) that the field notes are duly recorded, giving the book and page.

(b) If the survey was made by a deputy, the county surveyor shall certify officially that:

(1) he has examined the field notes;

(2) he finds them correct; and

(3) he has determined that the survey is duly recorded, giving the book and page of record.

Acts 1977, 65th Leg., p. 2356, ch. 871, art. I, Sec. 1, eff. Sept. 1, 1977.