; and (G) an interpretive plan for the Heritage Area; and (4) recommend policies and strategies for resource management that consider and detail the application of appropriate land and water management techniques, including the development of intergovernmental and interagency cooperative agreements to protect the natural, historical, cultural, educational, scenic, and recreational resources of the Heritage Area. (c) Deadline If a proposed management plan is not submitted to the Secretary by the date that is 3 years after the date of enactment of this Act, the management entity shall be ineligible to receive the designation of a National Heritage Area under this Act until the date that the Secretary receives and approves the management plan. (d) Approval or disapproval of management plan (1) In general Not later than 180 days after the date of receipt of the management plan under subsection (a), the Secretary, in consultation with the State, shall approve or disapprove the management plan. (2) Criteria for approval In determining whether to approve the management plan, the Secretary shall consider whether— (A) the management entity is representative of the diverse interests of the Heritage Area, including governments, natural and historic resource protection organizations, educational institutions, businesses, and recreational organizations; (B) the management entity has afforded adequate opportunity, including public hearings, for public and governmental involvement in the preparation of the management plan; and (C) the resource protection and interpretation strategies contained in the management plan, if implemented, would adequately protect the natural, historical, and cultural resources of the Heritage Area. (3) Action following disapproval If the Secretary disapproves the management plan under paragraph (1), the Secretary shall— (A) advise the management entity in writing of the reasons for the disapproval; (B) make recommendations for revisions to the management plan