Under what circumstance may Border Patrol officers act as customs officers?

Border Patrol officers may act as customs officers when designated by Title 19 of the United States Code. This designation allows them to enforce customs laws and regulations under specific circumstances, particularly concerning the enforcement of trade laws and protection of the economy from illegal importation of goods. The authority granted under Title 19 enables the Border Patrol to engage in customs-related activities at the borders and designated customs areas, which is essential for maintaining border security and facilitating lawful trade.

The other circumstances listed do not provide the necessary legal foundation for Border Patrol officers to perform the duties of customs officers. For instance, while international airports and raids on criminal organizations might involve customs-related activities, these scenarios are not inherent to the authority granted to the Border Patrol. Acting on suspicion alone does not give the officers the same level of enforcement authority as what is conferred by Title 19 USC.