§ 160-j. Marking requirements. Grapes in packages, if not definitely marked as unclassified as hereinbefore provided, shall, prior to shipment, be marked in a plain and conspicuous manner with the name and address of the person or association under whose authority the grapes are packed and on an irremovable part of the container with a statement of (1) the grade, and (2) the net quantity or weight of contents.