Where goods are shipped in pursuance of an agreement of the kind specified in section 7C of the Australian Industries Preservation Act 1906 - 1937 , the amount paid or payable to the owner or charterer of the ship in respect of the carriage of those goods shall, for the purposes of this Division, be deemed to be the amount remaining after deducting from the amount which would be payable according to the gross rate of freight specified in the agreement the amount of any rebate allowed in pursuance of the agreement or any payment, whenever made, by the owner or charterer, or out of funds provided by the owner or charterer, to any person or persons being the owner or shipper of the goods or the agent of either of them in respect of the shipment.