Sec. 58.529. ADMINISTRATIVE AUTHORITY OF BOARD. The board shall administer all business incident to the creation and operation of a defined area or service to designated property unless otherwise provided by contract. Added by Acts 1977, 65th Leg., p. 1537, ch. 627, Sec. 1, eff. Aug. 29, 1977. SUBCHAPTER L. TAXATION ON THE AD VALOREM BASIS