Every person who handles rice in any quantity shall keep a complete and accurate record of all transactions involving the purchase or sale of rice and shall submit the record to the commission in the time and manner specified by the commission. The records shall be in a simple form and contain the information that the commission prescribes. The records shall be preserved by the handler for a period of three years and shall be offered and submitted for inspection at any reasonable time upon written demand of the commission or its duly authorized agent.