Prior to construction by any governmental body on any public land, a public hearing shall be held before the Planning Commission in accordance with procedures set forth in Section 762.05 for conditional uses. In the event that public lands or any portion thereof are sold, transferred, exchanged or in any other manner relinquished from public control, no building permit shall be issued, nor shall any use be permitted on such land, except when such use conforms to the district regulations in which it is located.