Tex. Water Code § 49.219

Any district may acquire by agreement all or any part of existing water, sanitary sewer, or drainage systems of any water supply corporation, including works, improvements, facilities, plants, equipment, appliances, contract rights, and other assets and rights that are completed, partially completed, or under construction, and in connection therewith a district may assume all or any part of the contracts, indebtedness, or obligations of the corporation related to said systems, including any contracts, indebtedness, or obligations related to or payable from the revenues of said systems, and may perform all or any part of the obligations of said corporation in the same manner and to the same extent that any other purchaser or assignee could be bound on any such contracts, indebtedness, or obligations. Before assuming any indebtedness or obligations of such corporation related to any such system, a district other than a special water authority shall obtain the approval of the commission of such assumption.