Companies may change filed tariffs by one of two methods:
Wash. Admin. Code § 480-70-311
Statutory Authority: RCW 81.04.160, 81.77.030 and 80.01.040. 01-08-012 (Docket No. TG-990161, General Order No. R-479), § 480-70-311, filed 3/23/01, effective 4/23/01.