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Ports using contingency anchorages as number of ships waiting for berths grow.
PMA neither loaded nor unloaded ships over the weekend, leaving yard and gate operations up to individual terminals.
Employers "hopeful that this will allow us to move toward conclusion of an agreement in the near term."
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.