Wash. Admin. Code § 388-02-0075
(1) A party may file documents by delivering them to OAH or BOA by:
[Statutory Authority: RCW 43.17.060, 43.20A.550, 34.05.020, 34.05.350 and Proclamation by the Governor 20-05. WSR 20-22-096, § 388-02-0075, filed 11/3/20, effective 12/4/20. Statutory Authority: RCW 34.05.020. WSR 00-18-059, § 388-02-0075, filed 9/1/00, effective 10/2/00.]