Wash. Rev. Code § 46.37.194
The state patrol may make rules and regulations relating to authorized emergency vehicles and shall test and approve sirens and emergency vehicle lamps to be used on such vehicles. The equipment and standards review unit shall require a record check of all applicants and drivers for an authorized emergency vehicle permit through the Washington state patrol criminal identification section pursuant to RCW 10.97.050 and through the federal bureau of investigation before issuing an authorized emergency vehicle permit. The record check shall include a fingerprint check using a complete Washington state criminal identification fingerprint card. When necessary, applicants and drivers may be employed on a conditional basis pending completion of the investigation. Pursuant to RCW 43.43.742, the applicant, driver, or employer shall pay costs associated with the record check.
RCW 46.37.194
Construction-Application of rules-Severability-1987 c 330: See notes following RCW 28B.12.050.