Each handler shall keep records which will clearly show the details of his or her receipts of almonds, withholdings, sales, shipments, inventories, reserve disposition, advertising and promotion activities, as well as other pertinent information regarding his or her operation pursuant to the provisions of this part: Provided, that, such records shall be kept in the State of California. Such records shall be retained by the handler for 2 years after the end of the crop year to which they apply. Each handler's premises shall be accessible to authorized representatives of the Board and the Secretary for examination and audit of the aforesaid records and for inspection and observation of almonds. The Board shall make such checks of almonds or audits of each handler's records as it deems appropriate or are requested by the Secretary to ensure that accurate information as required in this part is being furnished by handlers.