What is customs?Chapter II - World Customs Organization: history, instruments, administration.Chapter III - Regulations for the Federal Customs Service of Russia: organization, management.A customs duty is a tariff or tax on the export of goods.All authorized ports are recognized customs area.Passengers going through the Green Channel are only subject to spot checks and save time.Canada and the United States do not operate a red and green channel system.Airports within the EU also have a Blue Channel.As the EU is a customs union, travelers between EU countries do not have to pay customs duties.Luggage tickets for checked in luggage within the EU are green-edged so they may be identified.