(a) The disbursing officer of each agency, board, commission, department, or institution shall be responsible for reviewing all invoices prepared by commercial printers or suppliers holding commercial contracts to make certain that the charges to the agency, board, commission, department, or institution are proper under the terms of the contract.
(b) The Office of State Procurement shall maintain complete files that shall be open to public inspection on all commercial term and one-time contracts. The files shall contain:
(1) A copy of the contract;
(2) A list of all printing or duplicating done or commodities ordered, as well as the name of the invoiced agency; and
(3) A copy of all correspondence regarding the contract or jobs performed thereunder.