(a) No greater sum than is necessary to meet expenses then incurred shall be drawn from the Treasury of this State for or on account of any agency. An agency which is authorized to expend any moneys on behalf of this State may, however, have money advanced to it from the State Treasury, in such sums and subject to such rules and regulations as the Secretary of Finance may determine; provided however, that the amount advanced from the General Fund to any agency at any 1 time shall not exceed $5,000.
(b) To secure such an advance, the head of the agency desiring the same must certify in duplicate to the Secretary of Finance what amount is needed, that it is needed for immediate use and, as specifically as may be, the purposes for which the expenditure is required. The Secretary of Finance and the State Treasurer shall deal with such certificates in the same manner as with bills or statements of indebtedness as provided in this chapter.
(c) In case of any such advance, the person or official making the certificate shall within 30 days after receipt of an advance file with the Secretary of Finance and the State Treasurer a detailed statement of the amounts expended with vouchers therefor and all advances so made shall be accounted for.