Wash. Rev. Code § 58.17.260
In order that there be a degree of uniformity of survey monumentation throughout the cities, towns and counties of the state of Washington, there is hereby created a joint committee composed of six members to be appointed as follows: The Washington state association of counties shall appoint two county road engineers; the association of Washington cities shall appoint two city engineers; the land surveyors association of Washington shall appoint one member; and the consulting engineers association of Washington shall appoint one member. The joint committee is directed to cooperate with the department of natural resources to establish recommendations pertaining to requirements of survey, monumentation and plat drawings for subdivisions and dedications throughout the state of Washington. The department of natural resources shall publish such recommendation.
RCW 58.17.260