(a) Each SSOA shall designate its personnel and contractors who conduct safety audits and examinations of public transportation systems, including appropriate managers and supervisors of such personnel, that must comply with the applicable training requirements of Appendix A to this part.

(b) Designated personnel shall complete applicable training requirements of this part within three (3) years of their initial designation. Thereafter, refresher training shall be completed every two (2) years. The SSOA shall determine refresher training requirements which must include, at a minimum, one (1) hour of safety oversight training.