RCW 81.16.070

Whenever the commission finds upon investigation that any public service company is making payments to an affiliated interest, although the payments have been disallowed or disapproved by the commission in a proceeding involving the public service company's rates or practices, the commission shall issue a summary order directing the public service company to not treat the payments as operating expenses or capital expenditures for rate or valuation purposes, unless and until the payments have received the approval of the commission.