Registration takes less than 1 minute.
Workers will try to clear backlog from terminals.
Move comes as ILWU, PMA talks enter 10th month.
The Maersk Garonne was pulled free early Saturday morning, just hours after running aground.
Marine terminal officials agree that future contracts will require ongoing collaboration.
Maersk Line CEO Soren Skou told American Shipper container lines need to adapt to permanent overcapacity, and cited Maersk's network management as the primary driver of bumper profits in recent years.
Economist revised forecasts, predicting lower import growth and a second year of declines in exports.