19 U.S.C. § 1603 — Seizure; warrants and reports

Any property which is subject to forfeiture to the United States for violation of the customs laws and which is not subject to search and seizure in accordance with the provisions of section 1595 of this title, may be seized by the appropriate officer or person upon process issued in the same manner as provided for a search warrant under the Federal Rules of Criminal Procedure. This authority is in addition to any seizure authority otherwise provided by law.

Whenever a seizure of merchandise for violation of the customs laws is made, or a violation of the customs laws is discovered, and legal proceedings by the United States attorney in connection with such seizure or discovery are required, it shall be the duty of the appropriate customs officer to report promptly such seizure or violation to the United States attorney for the district in which such violation has occurred, or in which such seizure was made, and to include in such report a statement of all the facts and circumstances of the case within his knowledge, with the names of the witnesses and a citation to the statute or statutes believed to have been violated, and on which reliance may be had for forfeiture or conviction.