Wash. Rev. Code § 81.75.020
Through its council or other legislative body, any city, town, county, public transportation benefit area authority, or other municipal corporation, authorized to operate public transportation services, may construct or otherwise acquire intermodal transportation centers by donation, lease, or purchase and may operate or let for purposes of leasing space at fair market value for the services set forth in RCW 81.75.030, and to perform other functions permitted by law, the centers or portions of the centers, for public or private purposes or for compensation or rental upon such conditions as its council or other legislative body shall from time to time prescribe. The city, town, county, public transportation benefit area authority, or municipal corporation, may apply for and receive grants from the federal government for purposes of funding a transportation center and may consolidate a transportation center with other lawful city or town activities.
RCW 81.75.020