Texas Water Code - WATER § 17.186. Alteration of Plans

After the executive administrator approves of engineering plans, a political subdivision may not make any substantial or material alteration in the plans unless the executive administrator authorizes the alteration in accordance with rules of the board.  For a waste water treatment plant or other facility required to have commission approval of the plans and specifications, the commission must give its approval before a substantial or material alteration is made in those plans.