U.S. Customs and Border Protection (CBP)enforces all import and export regulations within U.S. ports of entry. CLT 4.0 emphasizes that CBP ensures compliance with customs laws, tariff assessments, trade embargoes, and security programs. While USDOT oversees transport safety and CTPAT is a voluntary security initiative under CBP, the CBP itself holds enforcement authority. It inspects cargo, verifies documentation, collects duties, and ensures compliance with U.S. trade laws and international agreements. For logistics technicians, understanding CBP procedures—including entry filings, tariff classifications, and inspection processes—is critical to maintaining the legal movement of goods across borders. CBP’s oversight protects domestic markets and supports national security by preventing smuggling, counterfeit goods, and noncompliant imports.