This chapter shall be subject to a special initiative. The number of registered voters needed to sign a petition for special initiative shall be 15 percent of the total number of names of persons listed as registered voters within the city on the day of the last preceding municipal general election. If a special initiative petition is filed with the city council, the operation of this chapter shall not be suspended pending a final decision on the disposition of the special initiative. The procedures for initiative contained in RCW 35A.11.100 shall apply to any such special initiative petition. (Ord. 415 § 1, 1982; Ord. 399 § 6, 1982).