To be certified as an adjunct instructor, an applicant must satisfy at least one of the following requirements:

Upon approval of an application for certification as an adjunct instructor, the secretary shall issue a certificate or letter certifying the applicant as an adjunct instructor and specifying the training course which the adjunct instructor is certified to teach or present. Such certification or letter shall be subject to such terms and conditions as may be specified, and, if not sooner revoked, such certification may be renewed on the date specified in such certificate if the secretary finds that the instructor still qualifies for certification as an adjunct instructor.

A certification issued to an adjunct instructor pursuant to this section may be revoked by the secretary if the secretary determines, after notice and an opportunity to be heard, that the application for certification of the adjunct instructor contains any false or misleading statement, or that the instructor has demonstrated incompetency or untrustworthiness. The department may audit courses taught by adjunct instructors at any time to ensure satisfactory performance.

Subdivisions (a) through (c) of this section shall not apply to adjunct instructors who are employees of the department. However, no employee of the department shall act as an adjunct instructor unless such employee is, in the judgment of the department, capable of teaching or presenting training courses in a manner that will provide appropriate training to persons who are or who wish to become building safety inspectors or code enforcement officials.