Every operator in any prorated common source of supply shall, when required by any rule, order, or regulation of the Commission, keep books showing accurately (a) the amount of oil produced daily from each lease or property operated by him or it and, if the Commission shall order, from each well owned or operated by him or it on each such lease or property, and (b) the amount of oil sold or otherwise disposed of each day from each of his or its said properties, and, when so required by the order of the Commission, from each of his or its wells thereon and to whom the same is sold and delivered. Said books and all documents and records made by any such operator relating to the operation of his or its properties or wells in any such prorated common source of supply shall at all times be open for the inspection of the Commission or any officer, agent or employee authorized and directed by the Commission by its order to inspect or examine the same; and shall, upon the order of the Commission or the request of any such authorized officer, agent or employee be made immediately available for such inspection.