A. At an inactive mining unit, the following are not subject to the requirements of this chapter:
1. Voluntary reclamation measures that are not required by federal or state law, regulation or permit.
2. Actions that are required to comply with other local, state or federal laws, regulations, permits, orders or decrees.
3. Maintenance activities.
B. Exploration operations and mineral development, mining, concentrating and leaching activities at an inactive mining unit are subject to the requirements of this chapter only with respect to new surface disturbances created by those operations and activities.