Each member of the board, except the secretary of transportation or the secretary's designee, shall be:
When making appointments, each county executive shall ensure that representation on the board includes an elected city official representing the largest city in each county and assures proportional representation from other cities, and representation from unincorporated areas of each county within the service area. At least one-half of all appointees from each county shall serve on the governing authority of a public transportation system.
Members appointed from each county shall serve staggered four-year terms. Vacancies shall be filled by appointment for the remainder of the unexpired term of the position being vacated.
The governing board shall be reconstituted, with regard to the number of representatives from each county, on a population basis, using the official office of financial management population estimates, five years after its initial formation and, at minimum, in the year following each official federal census. The board membership may be reduced, maintained, or expanded to reflect population changes but under no circumstances may the board membership exceed twenty-five.
RCW 81.112.040