(1) Upon receiving a complaint or protest concerning rates or charges, or on its own initiative, the commission may suspend tariff rates, terms, or conditions as provided in RCW 81.04.130.

(2) The commission will not take action to suspend a tariff, or any part of a tariff, based on a complaint or protest concerning rates or charges unless the complaint or protest is filed in compliance with the commission's rules of practice and procedure in chapter 480-07 WAC.