(1) In carrying out the powers authorized by this chapter and chapter
53.06 RCW, port districts and the Washington public ports association are authorized to cooperate, act, and invest jointly with other public and private agencies and persons, including, but not limited to, the federal government, the state, other ports and municipal corporations, other states and their political subdivisions, and private nonprofit trade promotion groups and associate development organizations.
(2) Port districts operating trade center buildings or operating association or federation trade centers, shall pay an annual service fee to the county treasurer wherein the center is located for municipal services rendered to the trade center building. The measure of such service fee shall be equal to three percent of the gross rentals received from the nongovernmental tenants of such trade center building. Such proceeds shall be distributed by the county treasurer as follows: Forty percent to the school district, forty percent to the city, and twenty percent to the county wherein the center is located: PROVIDED, That if the center is located in an unincorporated area, twenty percent shall be allocated to the fire district, forty percent to the school district, and forty percent to the county.