Any public warehouse or other public storage facility owned or otherwise controlled by the District shall be operated by persons under contracts with the District. Any such contract shall reserve reasonable rentals or other charges payable to the District sufficient to pay the cost of maintaining, repairing, regulating and operating the facilities and to pay principal of and interest on any revenue bonds issued by the District and may contain such other conditions as may be mutually agreed upon. However, upon the breach of such a contract or if no contract is in existence as to any such facility, the District shall temporarily operate such facility until a contract for its operation can be negotiated.