Liner operators led by AP Moller-Maersk and Hapag-Lloyd are pushing back against executive action taken by US President Joe Biden to lower shipping costs.
The World Shipping Council (WSC) said there was no problem to fix and warned that legislative action would make the matter worse.
The liner body said that carriers had already "pulled out all the stops" to manage operational disruptions brought on by Covid-19, which is preventing ships from berthing and unloading cargo.
