(1) Procedures. The commission's procedural rules are contained in chapter 480-07 WAC and apply to common carriers regulated under this chapter. If a rule in this chapter conflicts with a rule in chapter 480-07 WAC, the rule in this chapter applies.

(2) Documents. All petitions, complaints, applications for common carrier permits or extensions, or any other matter required to be served upon or filed with the Washington utilities and transportation commission must be served or filed upon the commission at its headquarters office as shown in WAC 480-04-035, upon the secretary of the commission. Any petition, complaint, application, or other matter required to be served upon or filed with the commission will not be considered served or filed until it is received at the headquarters office.