The charges made by the board pursuant to Section 2-6-51 shall be deposited monthly in the State Treasury to the credit of a special fund therein designated the Agricultural Center Fund and shall be used solely for the payment of the rentals payable under the lease agreement and the said operating and administrative expenses. So much of the moneys in the Agricultural Center Fund as may be necessary therefor are hereby appropriated for said purposes. In the event the revenues derived from the operation of the properties covered by the lease agreement should not be sufficient to pay, as the same respectively mature, the rentals required to be paid by the board under the provisions of the lease agreement and to pay the said operating and administrative expenses, there is hereby appropriated and ordered set aside in each fiscal year during the term of the lease agreement, solely out of moneys accruing to the Agricultural Fund under the provisions of Section 2-6-52, such amount as, when added to the moneys in the Agricultural Center Fund derived during that fiscal year from the operation of the properties covered by the lease agreement, shall be sufficient to pay the said rentals and the said operating and administrative expenses payable during each such fiscal year. The board is hereby authorized to pledge in the lease agreement for payment of said rentals so much as may be necessary for such purpose of the moneys required by this section to be paid into the Agricultural Center Fund. The moneys so appropriated for the payment of the said rentals shall be transferred by the State Treasurer to the credit of the corporation from time to time as may be necessary to pay said rentals. All other withdrawals from the Agricultural Center Fund shall be made upon requisition by the chairman of the board to the State Comptroller and upon warrant drawn by the State Comptroller upon the State Treasurer. Nothing contained in this section shall be construed to estop or prevent the Legislature at any time and from time to time in the future from altering the amounts and rates of the fees, licenses, fines, penalties and charges, the collections from which may now or hereafter be required by law to be paid into the Agricultural Fund, or from abolishing any thereof or substituting others therefor or adding others thereto as the Legislature, in its discretion, may from time to time deem advisable. The appropriations made in this section for the payment of rentals under the lease agreement shall not be subject to the provisions of Article 4 of Chapter 4 of Title 41 of this Code, and shall not be restricted by or subject to the provisions of any other act making general or special appropriations.