Wash. Admin. Code § 480-120-173
Statutory Authority: RCW 80.01.040 and 80.04.160. 05-03-031 (Docket No. UT 040015, General Order No. R-516), § 480-120-173, filed 1/10/05, effective 2/10/05; 03-01-065 and 03-03-090 (Docket No. UT-990146, General Order No. R-507 and 507A), § 480-120-173, filed 12/12/02 and 1/16/03, effective 7/1/03.