The department shall establish and maintain a separate record with respect to each unit of development that may have been or may be acquired, constructed or operated in whole or in part under the provisions of this article or the 1957 Docks Act. Each such separate record shall show: (1) The total amount of the capital investment in each such unit of development, including the amount of such capital investment derived from the proceeds of the bonds issued hereunder or under the 1957 Docks Act, and the amount, if any, of the said capital investment derived from any other source; (2) the expenses of operating each such unit of development; and (3) the gross revenues derived from the operation of each such unit of development. In the event any proceeds from bonds issued either under this article or the 1957 Docks Act shall be used to pay any of the operating expenses of any unit of development, the amount of bond proceeds so used shall be deemed a part of the capital investment in such unit of development.