Any PBT instrument used must have been certified within the previous six months. In order to certify a PBT instrument as accurate, the certifying agent must follow a protocol approved by the state toxicologist.
Wash. Admin. Code § 448-15-040
Statutory Authority: RCW 46.61.506. 08-05-029, § 448-15-040, filed 2/12/08, effective 3/14/08; 99-06-047, § 448-15-040, filed 3/1/99, effective 4/1/99.