In lieu of a renewal examination every three-year period as provided in Sections 11105(b)(2) and 11105.1(b)(2) of the Vehicle Code, the department will accept evidence of completion within two (2) years of a college level course equivalent to two (2) semester units. The department will accept participation in appropriate courses and seminars as evidence of continuing professional education. To be acceptable, such participation must consist of a minimum of eighteen (18) hours within the preceding three (3) years.