31 C.F.R. § 560.702 Detention of shipments.
Title 31 - Money and Finance: Treasury
Import shipments into the United States of Iranian-origin goods in violation of §560.201 and export shipments from the United States of goods destined for Iran in violation of §560.202 or 560.204 shall be detained. No such import, export, or reexport will be permitted to proceed, except as specifically authorized by the Secretary of the Treasury. Unless licensed, such shipments are subject to penalty or seizure and forfeiture action, under the Customs laws or other applicable provisions of law, depending on the circumstances.
Title 31: Money and Finance: Treasury
PART 560—IRANIAN TRANSACTIONS REGULATIONS
Subpart G—Penalties
§ 560.702 Detention of shipments.

