Wash. Rev. Code § 80.01.075 (2025)

The commission shall have the authority as petitioner, intervenor or otherwise to initiate and/or participate in proceedings before federal administrative agencies in which there is at issue the authority, rates or practices for transportation or utility services affecting the interests of the state of Washington, its businesses and general public, and to do all things necessary in its opinion to present to such federal administrative agencies all facts bearing upon such issues, and to similarly initiate and/or participate in any judicial proceedings relating thereto.