Customs station. A Customs station is any place, other than a port of entry, at which Customs officers or employees are stationed, under the authority contained in article IX of the President's Message of March 3, 1913 (T.D. 33249), to enter and clear vessels, accept entries of merchandise, collect duties, and enforce the various provisions of the Customs and navigation laws of the United States.
19 CFR § 101.1
As used in this chapter, the following terms shall have the meanings indicated unless either the context in which they are used requires a different meaning or a different definition is prescribed for a particular part or portion thereof: