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Draymen say they could be forced out of business by huge demurrage and detention bills.
Employers "hopeful that this will allow us to move toward conclusion of an agreement in the near term."
PMA said ships will not load or unload cargo Thursday, Saturday, Sunday or Monday due to continuing ILWU slowdowns.
Experimental off dock drop yard at the Port of Los Angeles could help speed containers.
The International Association of Classifications Societies said it would continue to study the report and the will finalized the requirements soon.
The federal agency alleges shipments did not include relevant documents and were improperly packaged and labeled.