Wash. Admin. Code § 246-292-075
(1) The department may issue a certification for a WDS, WDM, or WTPO without examination to an applicant who has a valid, unrestricted certificate from another state or province if:
(2) An applicant for a WDS, WDM, or WTPO certification by reciprocity shall comply with the requirements in WAC 246-292-070, except the examination and application fees and submit:
[Statutory Authority: RCW 70.119.050 and chapter 70.119 RCW. WSR 14-01-003, § 246-292-075, filed 12/4/13, effective 1/4/14. Statutory Authority: Chapter 70.119 RCW and Safe Drinking Water Act, Public Law 104-182; 64 F.R. 5916 - 5921. WSR 01-02-070, § 246-292-075, filed 12/29/00, effective 1/29/01. Statutory Authority: Chapter 70.119 RCW. WSR 94-04-004, § 246-292-075, filed 1/20/94, effective 2/20/94.]