Informed Compliance Publications
CBP has a number of Informed Compliance Publications (ICPs) in the "What Every Member of the Trade Community Should Know About: ..." series. As of the date of this posting, the subjects listed are available for reading or downloading. The first date shown is the original publication date. The subsequent dates, if any, show the revisions.
Additionally, CBP publishes several Directives and Handbooks, which provide guidance to the public on a variety of trade-related matters.