The Mississippi Agricultural and Industrial Board, hereinafter referred to as the "board," in issuing a certificate of public convenience and necessity to a municipality to engage in the acquisition and development of a "standard" industrial park or district shall be advised by the municipality of its need to use the power of eminent domain in the acquisition of a part of the acreage involved, not to exceed twenty-five percent (25%), and the board shall so specify in said certificate, which shall be the municipality's evidence of authority to use the power of eminent domain as above specifically defined.