They also arrange the transhipment (i.e., local delivery) of merchandise via trucking companies. Many customs brokers specialize in certain goods like apparel, perishables, or clearing the crew and manifest of large cargo vessels. Most are located at major airports and harbors with international traffic.[2] However, with the advent of the Automated Broker Interface and rules allowing customs brokers to be permitted nationally (as opposed to specific ports), customs brokers no longer need to be located near a port.