WA Rev Code § 9.41.251 (2021)
2021 Revised Code of Washington|Title 9 - Crimes and Punishments|Chapter 9.41 - Firearms and Dangerous Weapons.|9.41.251 - Dangerous weapons—Application of restrictions to law enforcement, firefighting, rescue, and military personnel.

RCW 9.41.251 Dangerous weapons—Application of restrictions to law enforcement, firefighting, rescue, and military personnel.(1) RCW 9.41.250 does not apply to:(a) The possession or use of a spring blade knife by a general authority law enforcement officer, firefighter or rescue member, Washington state patrol officer, or military member, while the officer or member:(i) Is on official duty; or(ii) Is transporting a spring blade knife to or from the place where the knife is stored when the officer or member is not on official duty; or(iii) Is storing a spring blade knife;(b) The manufacture, sale, transportation, transfer, distribution, or possession of spring blade knives pursuant to contract with a general authority law enforcement agency, fire or rescue agency, Washington state patrol, or military service, or pursuant to a contract with another manufacturer or a commercial distributor of knives for use, sale, or other disposition by the manufacturer or commercial distributor;(c) The manufacture, transportation, transfer, distribution, or possession of spring blade knives, with or without compensation and with or without a contract, solely for trial, test, or other provisional use for evaluation and assessment purposes, by a general authority law enforcement agency, fire or rescue agency, Washington state patrol, military service, or a manufacturer or commercial distributor of knives.(2) For the purposes of this section:(a) "Military member" means an active member of the United States military or naval forces, or a Washington national guard member called to active duty or during training.(b) "General law enforcement agency" means any agency, department, or division of a municipal corporation, political subdivision, or other unit of local government of this state or any other state, and any agency, department, or division of any state government, having as its primary function the detection and apprehension of persons committing infractions or violating the traffic or criminal laws in general.(c) "General law enforcement officer" means any person who is commissioned and employed by an employer on a full-time, fully compensated basis to enforce the criminal laws of the state of Washington generally. No person who is serving in a position that is basically clerical or secretarial in nature, or who is not commissioned shall be considered a law enforcement officer.(d) "Fire or rescue agency" means any agency, department, or division of a municipal corporation, political subdivision, or other unit of local government of this state or any other state, and any agency, department, or division of any state government, having as its primary function the prevention, control, or extinguishment of fire or provision of emergency medical services or rescue actions for persons.(e) "Firefighter or rescue member" means any person who is serving on a full-time, fully compensated basis as a member of a fire or rescue agency to prevent, control, or extinguish fire or provide emergency medical services or rescue actions for persons. No person who is serving in a position that is basically clerical or secretarial in nature shall be considered a firefighter or rescue member.(f) "Military service" means the active, reserve, or national guard components of the United States military, including the army, navy, air force, marines, and coast guard.[ 2012 c 179 § 2.]