Wash. Rev. Code § 35A.82.020
A code city may exercise the authority authorized by general law for any class of city to license and revoke the same for cause, to regulate, make inspections and to impose excises for regulation or revenue in regard to all places and kinds of business, production, commerce, entertainment, exhibition, and upon all occupations, trades and professions and any other lawful activity: PROVIDED, That no license or permit to engage in any such activity or place shall be granted to any who shall not first comply with the general laws of the state.
No such license shall be granted to continue for longer than a period of one year from the date thereof and no license or excise shall be required where the same shall have been preempted by the state, nor where exempted by the state, including, but not limited to, the provisions of RCW 36.71.090 and chapter 73.04 RCW relating to veterans.
RCW 35A.82.020