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Ports believe pool of more than 80,000 interchangeable chassis will help ease West Coast congestion.
Labor Secretary Thomas Perez met both parties accompanied by a mediator from the Federal Mediation and Conciliation Service who has been assisting in the talks since early January.
Draymen say they could be forced out of business by huge demurrage and detention bills.
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.
Violations outlined in the report include copyright piracy and trademark counterfeiting.