; (C) consider the interests of diverse units of government, businesses, organizations, and individuals in the Heritage Area in the preparation and implementation of the Heritage Area management plan; (D) conduct meetings open to the public at least semiannually regarding the development and implementation of the Heritage Area management plan; (E) for any year that Federal funds have been received under this Act— (i) submit an annual report to the Secretary that describes the activities, expenses, and income of the local coordinating entity (including grants to any other entities during the year that the report is made); (ii) make available to the Secretary for audit all records relating to the expenditure of the funds and any matching funds; 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 Act to acquire real property or any interest in real property. (4) Cost-sharing requirement The Federal share of the cost of any activity carried out using any assistance made available under this Act shall be 50 percent. (f) Heritage area 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 Heritage Area management plan. (2) Requirements The Heritage Area management plan shall— (A) incorporate an integrated and cooperative approach to agricultural resources and activities, flood protection facilities, and other public infrastructure; (B) emphasize the importance of the resources described in subparagraph (A); (C) take into consideration State and local plans