How do customs officer understand the concept of arrival and departure?

Customs officers understand the concept of arrival and departure based on the movement of individuals and goods across international borders. When individuals or goods enter a country, they are considered to have arrived, and when they leave the country, they are considered to have departed.

Customs officers are responsible for monitoring and regulating the movement of people and goods across borders to ensure compliance with customs laws and regulations. They use various tools and techniques, such as passport checks, cargo inspections, and surveillance systems, to determine whether individuals or goods are arriving or departing.

In addition, customs officers rely on documentation, such as travel itineraries, shipping manifests, and import/export declarations, to verify the arrival or departure status of individuals and goods. By understanding and enforcing the concept of arrival and departure, customs officers help to maintain the security and integrity of their country's borders.