Any revenues that shall accrue from the lands so managed by the Department of Conservation and Natural Resources subject to costs of administration shall be the property of the department or institution to which the lands belong or in which the department or institution shall own the beneficial interest. If the land shall be owned absolutely by the State of Alabama, and shall consist of submerged land, the revenue from the use of the land, with the exception of offshore oil and gas capital payments and sand and gravel royalties, shall become a part of the State Lands Fund of the Lands Division of the Department of Conservation and Natural Resources of the State of Alabama. In all other cases, however, the reasonable cost of administering, managing, protecting, mapping, surveying, cruising, or developing any unused lands shall be a charge against the income produced therefrom, and the charge shall be deducted from the income by the Commissioner of Conservation and Natural Resources and retained by the Department of Conservation and Natural Resources. The balance remaining shall be paid to the institution, department, or agency of the State of Alabama entitled thereto. If the lands are not submerged lands and are owned absolutely by the state, the revenue derived therefrom, less the cost of management, protection, and development of the lands, shall be paid by the Commissioner of Conservation and Natural Resources to the State Treasurer to become a part of the State General Fund.