Wash. Admin. Code § 212-17-430
(1) No common carrier, as defined in RCW 81.29.010, will deliver fireworks from an out-of-state shipper to any person or firm within this state without first determining:
[Statutory Authority: RCW 70.77.250. WSR 15-22-082, § 212-17-430, filed 11/3/15, effective 1/1/16. Statutory Authority: Chapters 43.43 and 70.77 RCW. WSR 05-12-033, § 212-17-430, filed 5/24/05, effective 6/24/05.]