LOS ANGELES - The Los Angeles-Long Beach port complex will start issuing fines to shipping companies if they let cargo containers stack up as the nation’s busiest twin harbors deal with an unprecedented backlog of vessels.The Los Angeles and Long Beach harbor commissions voted Friday to implement a 90-day "container excess dwell fee" that sets time limits on how long containers can stay at marine terminals.About 40% of all shipping containers entering the U.S.