(1) Certifying agent means persons certified by the state toxicologist, certified technician, or certified instructor as a preliminary breath test instrument (PBT) technician.

(2) Operator means a person certified as an evidential breath test instrument operator as described in chapter 448-16 WAC and trained and authorized to perform the tests for a PBT instrument as outlined in this chapter.

(3) PBT instrument means preliminary breath test instrument.

(4) PBT technician means a person trained and certified as competent and qualified to certify a PBT instrument according to the protocol approved by the state toxicologist.