Wash. Rev. Code § 35.21.315
No city or town shall enact or enforce an ordinance or regulation that fails to conform to the limited preemption entitled "Amateur Radio Preemption, 101 FCC 2nd 952 (1985)" issued by the federal communications commission. An ordinance or regulation adopted by a city or town with respect to amateur radio antennas shall conform to the limited federal preemption, that states local regulations that involve placement, screening, or height of antennas based on health, safety, or aesthetic considerations must be crafted to reasonably accommodate amateur communications, and to represent the minimal practicable regulation to accomplish the local authority's legitimate purpose.
RCW 35.21.315
Effective date-1994 c 50: "This act is necessary for the immediate preservation of the public peace, health, or safety, or support of the state government and its existing public institutions, and shall take effect immediately [March 23, 1994]." [ 1994 c 50 s 4.]