Wash. Rev. Code § 67.38.090
A cultural arts, stadium and convention district is a quasi municipal corporation, an independent taxing "authority" within the meaning of Article VII, section 1, of the state Constitution, and a "taxing district" within the meaning of Article VII, section 2, of the state Constitution. A district shall constitute a body corporate and shall possess all the usual powers of a corporation for public purpose. In addition to the powers specifically granted by this chapter, a district shall have all powers which are necessary to carry out the purposes of this chapter. A cultural arts, stadium and convention district may contract with the United States or any agency thereof, any state or agency thereof, any other cultural arts, stadium and convention district, any county, city, metropolitan municipal corporation, special district, or governmental agency, within or without the state, and any private person, firm or corporation for the purpose of receiving gifts or grants or securing loans or advances for preliminary planning and feasibility studies, or for the design, construction or renovation or operation of cultural arts, stadium and convention facilities. In addition, a district may contract with any governmental agency or with any private person, firm or corporation for the use by either contracting party of all or any part of the facilities, structures, lands, interests in lands, air rights over lands and rights-of-way of all kinds which are owned, leased or held by the other party and for the purpose of planning, constructing or operating any facility or performing any service which the cultural arts, stadium and convention district may be authorized to operate or perform, on such terms as may be agreed upon by the contracting parties. Before any contract for the lease or operation of any cultural arts, stadium and convention district facilities shall be let to any private person, firm or corporation, competitive bids shall be called upon such notice, bidder qualifications and bid conditions as the district shall determine.
A district may sue and be sued in its corporate capacity in all courts and in all proceedings.
RCW 67.38.090