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Shipper group also calls on carriers to quit discussion agreements, conferences.
GPA Executive Director says ports are unable to distinguish ad hoc voyages from normal rotations.
"Street turn" enabler said it has plans to enter the Montreal and West Coast North America markets as well.
Bipartisan legislation was introduced Thursday on Capitol Hill to extend TPA to President Obama.
Tampa, Mobile and Houston joined forces to lure container lines.
The Shanghai Shipping Exchange shows spot rates to Europe at low of $399 per TEU.