Notwithstanding the provisions of Sections 5940 to 5954, inclusive, the district may acquire, develop, operate, or maintain public beaches or inland parks and recreation areas without holding the hearings and making the findings required by such provisions if there is compliance with Section 21151 of the Public Resources Code and Section 65402 of the Government Code; provided, however, that the board of supervisors shall hold at least one public hearing prior to the approval of any such project. Harbor improvement district funds may be expended prior to the public hearing for the purpose of obtaining compliance with Section 21151 of the Public Resources Code and Section 65402 of the Government Code.