Tex. Health and Safety Code § 366.051: PERMITS.

(a) A person must hold a permit and an approved plan to construct, alter, repair, extend, or operate an on-site sewage disposal system.

(b) If the on-site sewage disposal system is located in the jurisdiction of an authorized agent, the permit is issued by the authorized agent; otherwise, the permit is issued by the commission.

(c) A person may not begin to construct, alter, repair, or extend an on-site sewage disposal system that is owned by another person unless the owner or owner's representative shows proof of a permit and approved plan from the commission or authorized agent.

Acts 1989, 71st Leg., ch. 678, Sec. 1, eff. Sept. 1, 1989. Amended by Acts 1995, 74th Leg., ch. 76, Sec. 11.113, eff. Sept. 1, 1995.