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Move comes as ILWU, PMA talks enter 10th month.
Environmental advantages of liquid natural gas remain undisputed despite a lack of profitability, according to the commission.
The West Coast ports attributed "dramatic" downturn in volumes to congestion and lack of a ILWU labor contract.
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.