(a) Primary use; lading and unlading. The water area docking facilities, and any lading and unlading stations of a zone are intended primarily for the unlading of merchandise into the zone or the lading of merchandise for removal from the zone. Their use for other purposes may be terminated by Customs if found to endanger the revenue, or by the Board if found to impede the primary use of the zone.

(b) Carrier in zone not exempt from law or regulations. Nothing in the Act or the regulations in this part shall be construed as excepting any carrier entering, remaining in, or leaving a zone from the application of any other law or regulation.