19 CFR 111.4 : Customs Duties (§ 0.1 To Parts 400-599) — (§ 0.1 To Parts 135-140) — U.S. Customs And Border Protection, Department Of Homeland Security; Department Of The Treasury (§ 0.1 To Parts 135-140) — Customs Brokers (§ 111.0 To § 111.96) — General Provisions (§ 111.1 To § 111.5) — Transacting customs business without a license.

Any person who intentionally transacts customs business, other than as provided in § 111.2(a)(2), without holding a valid broker's license, will be liable for a monetary penalty for each such transaction as well as for each violation of any other provision of 19 U.S.C. 1641. The penalty will be assessed in accordance with subpart E of this part.