(c) For any residential unit which has been registered and for which a base rent has been listed or for any residential unit which an owner can show, by a preponderance of the evidence, a good faith attempt to comply with the registration requirements or who was exempt from registration requirements in a previous version of the ordinance or charter and for which the owner of that residential unit has subsequently found not to have been in compliance with the ordinance, charter, or regulation, all annual rent adjustments which
may have been denied during the period of the owner’s noncompliance shall be restored prospectively once the owner is in compliance with the ordinance, charter, or regulation.