Wash. Admin. Code § 415-501-487
Statutory Authority: RCW 41.50.050(5), 41.50.780(10), and 41.50.770. 04-22-053, §415-501-487, filed 10/29/04, effective 11/29/04. Statutory Authority: RCW 41.50.050(5), 41.50.030(2), 41.50.088(2), 41.50.770, and 41.50.780, 26 U.S.C. (Internal Revenue Code) and related tax regulations. 02-01-121, §415-501-487, filed 12/19/01, effective 1/1/02. Statutory Authority: RCW 41.50.770, [41.50.]780 and41.50.050 . 00-11-104, amended and recodified as §415-501-487, filed 5/18/00, effective 6/18/00. Statutory Authority: RCW 41.50.050 and 41.50.780(11). 96-16-020, § 415-512-087, filed 7/29/96, effective 7/29/96.