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Flexi-Van executive says "misplaced" chassis have aggravated congestion.
Senator seeks to change the "build America" requirement for Jones Act ships.
Port of Long Beach CEO said ports are in a "perfect position" to play this role.
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.