What are the obligations of a Tribe if it discovers a violation or breach?

As soon as practicable after discovering or receiving notice of a violation or breach of a lease, business agreement, or right-of-way of a Federal or Tribal environmental law resulting from an activity undertaken by a third party under a lease, business agreement, or right-of-way, the Tribe must provide written notice to the Secretary describing: (a) The nature of the violation or breach in reasonable detail; (b) The corrective action taken or planned by the Tribe; and (c) The proposed period for the corrective action to be completed.