PDFWAC 212-17-430
Transportation—By common carrier.
(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:
(a) That the person or firm possesses an importer's license, issued by the state fire marshal to receive them; or
(b) The shipper has an importer's license, issued by the state fire marshal to ship them into this state.
(2) Penalties for violations of this section are provided in WAC 212-17-515.