With regard to any permit issued pursuant to RCW 90.03.290 and 90.44.060 which authorizes withdrawal and use of waters subject of a regulation provided for in WAC 173-590-110 hereof, the priority date of said permit shall be the effective date of said regulation.
Wash. Admin. Code § 173-590-160
Order DE 75-32, § 173-590-160, filed 3/10/76.