The commission shall supervise and regulate every solid waste collection company in this state,
The commission, on complaint made on its own motion or by an aggrieved party, at any time, after providing the holder of any certificate with notice and an opportunity for a hearing at which it shall be proven that the holder has willfully violated or refused to observe any of the commission's orders, rules, or regulations, or has failed to operate as a solid waste collection company for a period of at least one year preceding the filing of the complaint, may suspend, revoke, alter, or amend any certificate issued under the provisions of this chapter.
RCW 81.77.030