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Flexi-Van executive says "misplaced" chassis have aggravated congestion.
Move comes as ILWU, PMA talks enter 10th month.
Ports believe pool of more than 80,000 interchangeable chassis will help ease West Coast congestion.
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.