Wash. Rev. Code § 35A.43.010
Chapters 35.43, 35.44, 35.45, 35.47, 35.48, 35.49, 35.50, 35.53, 35.54, 35.55, and 35.56 RCW all relating to municipal local improvements and made applicable to all incorporated cities and towns by RCW 35.43.030 are hereby recognized as applicable to all code cities, and the provisions thereof shall supersede the provisions of any charter of a charter code city inconsistent therewith. The provisions of the chapters named in this section shall be effective as to charter code cities to the same extent as such provisions are effective as to cities of the first class, and all code cities may exercise, in the manner provided, any authority therein granted to any class of city.
RCW 35A.43.010
Local improvements, supplemental authority: Chapter 35.51 RCW.