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PMA said ships will not load or unload cargo Thursday, Saturday, Sunday or Monday due to continuing ILWU slowdowns.
Transpacific carriers cite port congestion and stronger demand as economy improves.
Employers "hopeful that this will allow us to move toward conclusion of an agreement in the near term."
The International Association of Classifications Societies said it would continue to study the report and the will finalized the requirements soon.
The fellow NYK Group companies said vessel adjustments reduced CO2 emissions by 23%.
The federal agency alleges shipments did not include relevant documents and were improperly packaged and labeled.