Tex. Water Code § 5.174

(a) Except as otherwise specifically provided by this code and subject to the specific limitations provided by this code, on application of any person the commission shall furnish certified or other copies of any proceeding or other official record or of any map, paper, or document filed with the commission. A certified copy with the seal of the commission and the signature of the presiding officer of the commission or the executive director or chief clerk is admissible as evidence in any court or administrative proceeding.

(b) The commission shall provide in its rules the fees that will be charged for copies and is authorized to furnish copies, certified or otherwise, to a person without charge when the furnishing of the copies serves a public purpose. Other statutes concerning fees for copies of records do not apply to the commission, except that the fees set by the commission for copies prepared by the commission may not exceed those prescribed in Chapter 603, Government Code.