Bulk cargo refers to a type of shipping in which large quantities of a single commodity are shipped in a single container, without being separated or packaged into smaller units. Examples of bulk cargo include grains, ore, coal, oil, and other raw materials.

Break bulk cargo, on the other hand, refers to a type of shipping in which smaller quantities of various commodities are shipped in individual units, such as bags, boxes, drums, or barrels. These units are typically loaded onto a ship one at a time, rather than being loaded all at once in a single container. Break bulk cargo may include a wide range of products, such as manufactured goods, consumer goods, and construction materials.

CBP is responsible for regulating the import and export of both bulk and break bulk cargo, as well as enforcing U.S. trade laws and collecting duties and taxes on these shipments. The CBP also works to ensure that all cargo entering or leaving the U.S. is properly documented and meets all relevant regulations and standards.