(1) Whenever service is required under this chapter, it must be made as described in the definition of "serve" or "service" in WAC 110-03-0020.

(2) Service on DCYF should be made at the address provided in the notice of DCYF action.

(3) Documents must be served in a manner that shows proof of service, as provided in WAC 110-03-0090.

(4) A party must serve all parties, and a party's representative if the party is represented, at the same time the party files a document with OAH or BOA, or when otherwise required by law.