Cal. Food & Agric. Code § 79273

Every person who handles blueberries shall keep a complete and accurate record of all blueberries handled by him or her with the name of the producer whose blueberries were handled. A producer who delivers or markets blueberries to persons other than to a handler shall keep a complete and accurate record of all those blueberries. The records shall contain information required by the commission. The records shall be preserved by the producer or handler for a period of two years and shall be offered and submitted for inspection at any reasonable time upon written demand of the commission or its duly authorized agent.