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GPA Executive Director says ports are unable to distinguish ad hoc voyages from normal rotations.
U.S. steel exported in January fell 0.4 percent compared to the previous month.
Legal framework sets stage for expanding preclearance operations across borders.
The German ocean carrier said its financial results were impacted by costs from merger with Chilean liner CSAV.
ConAgra and Lululemon said they expect shipment delays for several more months as a result of West Coast port congestion.
The new container service will connect ports in China, Taiwan and South Korea with Mexico, Colombia, Peru and Chile.