Wash. Admin. Code § 72-171-410
Statutory Authority: RCW 72.40.022. 01-16-022, § 72-171-410, filed 7/20/01, effective 8/20/01. Statutory Authority: RCW 72.40.022 and 20 U.S.C. §§ 1401, 1412-1417 . 90-16-008, § 72-171-410, filed 7/19/90, effective 8/19/90.