(a) General. Occupancy by the same persons, equipment, or vehicles of any camping facility is limited to a total of 30 days in any calendar year in that unit. The Department may establish shorter or longer limits of occupancy.

(b) Shorter Limits. When the department has established shorter seasonal limits, no person (or persons) who have occupied a campsite for the established limit may reregister in the unit until the expiration of forty-eight (48) hours, from 12:00 noon of the checkout day to 12:00 noon of the second day following. Upon expiration of the established limit, the registered camper shall vacate the campsite of all persons, vehicles and equipment.