There is no exception for co-loaded containers. The IMO Guidelines are clear that the shipper named on the ocean carrier bill of lading is the party responsible for providing the container’s verified gross mass. IMO Guidelines, paragraph 7.3. Thus, the “master” forwarder named on the ocean carrier’s bill of lading is responsible for the accurate cargo weight verification of all the cargo from all the co-loading forwarders using the container, and may not simply pass on cargo weights that may have been declared by those other forwarders