Washington Revised Code Title 29A. Elections § 29A.76.040. Maps and census correspondence lists--Apportionment--Duties of secretary of state

(a) Coordinate and monitor precinct mapping functions of the county auditors and county engineers;

(b) Maintain official state base maps and correspondence lists and maintain an index of all such maps and lists;

(c) Furnish to the United States bureau of the census as needed for the decennial census of population, current, accurate, and easily readable versions of maps of all counties, cities, towns, and other areas of this state, which indicate current precinct boundaries together with copies of the census correspondence lists.