Wash. Rev. Code § 28B.07.340
All moneys received by or on behalf of the authority under this chapter, whether as proceeds from the sale of bonds or from other sources shall be deemed to be trust funds to be held and applied solely as provided in this chapter. The authority, in lieu of receiving and applying the moneys itself, may enter into an agreement or trust indenture with one or more banks or trust companies having the power and authority to conduct trust business in the state to:
(1) Perform all or any part of the obligations of the authority with respect to:
[ 2007 c 36 s 7.]
Policy—Purpose—2007 c 36: See note following RCW 28B.07.300.