(1) The department shall have the authority, on its own motion or upon complaint made to it, to investigate or audit any instructor to determine compliance with chapter 18.85 RCW and with the rules and regulations of this chapter.

(2) Complaints concerning approved instructors should be made in writing to the department.

(3) All approved instructors shall be subject to periodic visits by an official representative of the department who shall observe classroom activities, evaluate course content and instructor proficiency to ensure that courses are being taught in accordance with the provisions set forth.