No person shall land or take off an aircraft on or from the airport, or use any area restricted by the airport operator, except upon payment of such fees and charges as may, from time to time, be prescribed for such use, unless such person is entitled to make such use without such payment under a lease or other agreement authorized by the airport operator. Aircraft exempt from fees and charges are those public aircraft owned and operated by the United States, the states and political subdivisions of the states while being operated for official governmental duty and for purposes other than commercial operations or flight instruction and aircraft owned and operated by the armed forces of the United States. The list of fees are contained in Subpart F of these rules and regulations.