A mayor shall be elected for four-year terms of office and shall serve until his or her successor is elected, qualified and assumes office in accordance with RCW 29A.20.040. In the event of a vacancy in the office of mayor, the city council shall, by majority vote, choose a mayor pro tempore to fill the unexpired term. (Ord. 1004 § 4, 2005; Ord. 692 § 5, 1995; Ord. 189 § 1, 1974; Ord. 23 § 7, 1950. Formerly 2.12.070).