Legal Metrology Act, 2014 (Act No. 9 of 2014)

A delivery note, invoice or other writing issued in respect of any goods delivered in pursuance of a sale to a dealer and handed over to the dealer or his agent as prescribed in Regulation 15, must be retained by him or her for the duration of the possession of the goods after receipt, during which period it must be kept at hand and be produced to an authorised officer on demand.