Things are heating up in the midst of contract negotiations between the Pacific Maritime Association, which represents ocean carriers and terminal operators, and the International Longshore and Warehouse Union, which represents West Coast dockworkers. In an April 13 new release, PMA accused ILWU Local 13 of withholding labor at the Los Angeles and Long Beach seaports and refusing to allow PMA to take part in a labor dispatch procedure that is jointly administered by the union and employers, moves that the PMA says shut down terminals at the adjoining ports earlier this month. PMA also says Local 13 has also…