Wash. Admin. Code § 388-78A-2590
Statutory Authority: Chapter 18.20 RCW. 10-03-066, § 388-78A-2590, filed 1/15/10, effective 2/15/10. Statutory Authority: RCW 18.20.090 (2004 c 142 § 19) and chapter 18.20 RCW. 04-16-065, § 388-78A-2590, filed 7/30/04, effective 9/1/04.