; and (iii) require, with respect to all agreements authorizing expenditure of Federal funds by other organizations, that the organizations receiving the funds make available to the Secretary for audit all records concerning the expenditure of the funds; and (F) encourage by appropriate means economic viability that is consistent with the Heritage Area. (3) Prohibition on the acquisition of real property The local coordinating entity shall not use Federal funds made available under this section to acquire real property or any interest in real property. (d) Management plan (1) In general Not later than 3 years after the date of enactment of this Act, the local coordinating entity shall submit to the Secretary for approval a proposed management plan for the Heritage Area. (2) Requirements The management plan shall— (A) incorporate an integrated and cooperative approach for the protection, enhancement, and interpretation of the natural, cultural, historic, scenic, and recreational resources of the Heritage Area; (B) take into consideration State plans; (C) include— (i) an inventory of— (I) the resources located in the core area described in subsection (b)(2); and (II) any other property in the core area that— (aa) is related to the themes of the Heritage Area; and (bb) should be preserved, restored, managed, or maintained because of the significance of the property; (ii) describe comprehensive policies, goals, strategies and recommendations for telling the story of the heritage of the area covered by the designation and encouraging long-term resource protection, enhancement, interpretation, funding, management, and development; (iii) a description of actions that governments, private organizations, and individuals have agreed to take to protect the natural, historical and cultural resources of the Heritage Area