(1) Parking employers shall keep records necessary to demonstrate compliance with this Chapter, including but not limited to written explanations for each discharge, and business records purporting to justify discharges for bona fide economic reason(s). Parking employers shall retain such records for a period of two years, and shall allow the Agency access to such records, with appropriate notice and at a mutually agreeable time, to monitor compliance with the requirements of this Chapter. If a parking employer does not maintain or retain adequate records documenting compliance, or does not allow the Agency reasonable access to such records within 30 days of the Agency's request, it shall be presumed that the parking employer has violated the Chapter, absent clear and convincing evidence otherwise, in any enforcement action.