In this section the following words have the meanings indicated. “Enterprise Fund” means the Maryland–National Capital Park and Planning Commission Enterprise Fund. “Marina” means the Bladensburg Marina and Boat Basin established by Chapter 618 of the Acts of 1959, and all improvements, facilities, and appurtenances of the Bladensburg Marina and Boat Basin. The Commission shall administer, maintain, and operate the Marina. The Commission: shall adopt regulations for the use and enjoyment of the Marina to assure that the improvements and facilities are open to all residents on equal terms; shall set the fees for the use of the public and commercial navigation facilities; and may contract with the Washington Suburban Sanitary Commission for dredging activities relating to the maintenance and operation of the Marina. There is a Maryland–National Capital Park and Planning Commission Enterprise Fund. The Enterprise Fund shall finance and account for the maintenance and operation of the Marina. The Commission shall record revenues from the maintenance and operation of the Marina in the Enterprise Fund. The Commission shall use the revenues of the Enterprise Fund: to offset expenditures relating to the Marina; or for other enterprise funds of the Commission’s park and recreational facilities located in the regional district in the county. Each year the County Council shall impose on all property assessed for county tax purposes in the county an ad valorem tax at a rate that the Commission certifies as necessary to produce the amount required to pay the annual cost of the Marina, less the proceeds of the Enterprise Fund. The annual cost includes the cost of dredging operations relating to the maintenance and operation of the Marina. Montgomery County is not liable for any cost, debt, expense, or obligation relating to the administration, operation, or maintenance of the Marina. Funds for the administration, operation, or maintenance of the Marina may not be obtained from: Montgomery County’s portion of the budget; or Montgomery County’s portion of unbudgeted funds of the Commission.