This document amends the Customs Regulations to allow certain foreign- or U.S.-manufactured shipping devices arriving from Canada or Mexico to be released, under specified conditions, without entry and payment of duty at the time of arrival and without the devices being serially numbered or marked, if they are always transported on or within either intermodal and similar containers which are themselves vehicles or vehicle appurtenances and accessories. As millions of these devices are used annually in hundreds of millions of transportation moves between the United States and Canada or Mexico, Customs has determined that requiring the importing and exporting communities to individually mark and track these devices places a burden on commerce that may be alleviated.