Teamsters pull unionization petition one day before scheduled vote.
Economic group hires classification society to study natural gas applications for vessels.
The carrier saw a volume rise of 12 percent compared to Q3 2013.
Teamster-supported strikers continue labor action against units of XPO Logistics.
The ILWU and ILA will likely have concurrent contract negotiations, making cargo diversion difficult, an NRF official said.
No rapid conclusion is expected in labor contract talks that have been ongoing for six months.