Details of the agreement between the PMA and the International Longshore and Warehouse Union were not disclosed.
It was reported earlier that productivity had fallen 20 percent to 30 percent at the ports of Los Angeles and Long Beach because of what employers called "disruptive job actions" by longshore workers in the midst of talks on the new contract, according to the PMA.
The PMA represents cargo carriers, terminal operators and stevedores at 29 West Coast ports.