Section 15. (1) Rules 12, 13 and 14 do not affect either the relations of the consignor or the consignee, wi

15. (1) Rules 12, 13 and 14 do not affect either the relations of the consignor or the consignee, with each other or the mutual relations of third parties whose rights are derived either from the consignor or from the consignee. (2) The provisions of rules 12, 13 and 14 can only be varied by express provision in the air consignment note. 15. (1) Rules 12, 13 and 14 do not affect either the relations of the consignor or the consignee with each other or the mutual relations of third parties whose rights are derived either from the consignor or from the consignee. (2) The provisions of rules 12, 13 and 14 can only be varied by express provision in the air waybill. (3) Nothing in these rules prevents the issue of a negotiable air waybill. 15. (1) The provisions of rules 12, 13 and 14 shall not affect either the relations of the consignor and the consignee with each other or the mutual relations of third parties whose rights are derived either from the consignor or from the consignee. (2) The provisions of rules 12, 13 and 14 shall be varied only by express provision in the air waybill or the cargo receipt.