(a) Except as provided by Subsection (b) of this section, the commission shall hold a hearing and shall give the holder of the permit, certified filing, or certificate of adjudication and other interested persons an opportunity to be heard and to present evidence on any matter pertinent to the questions at issue.(b) A hearing on the cancellation of a permit, certified filing, or certificate of adjudication as provided by this chapter is unnecessary if the right to such hearing is expressly waived by the affected holder of a permit, certified filing, or certificate of adjudication.(c) A permit, certified filing, or certificate of adjudication for a term does not vest in the holder of a permit, certified filing, or certificate of adjudication any right to the diversion, impoundment, or use of water for longer than the term of the permit, certified filing, or certificate of adjudication and shall expire and be cancelled in accordance with its terms without further need for notice or hearing.Amended By Acts 1997, 75th Leg., ch. 1010, Sec. 2.12, eff. 9/1/1997.Amended By Acts 1991, 72nd Leg., ch. 309, Sec. 5, eff. 9/1/1991Amended by Acts 1977, 65th Leg., p. 2207, ch. 870, Sec. 1, eff. 9/1/1977