The Customs Convention on the International Transport of Goods under Cover of TIR Carnets (TIR Convention, 1975) is an international transport conventions and is so far the only universal Customs transit system in existence. To date, it has 78 Contracting Parties, including the European Union.
It covers the whole of Europe and reaches out to North Africa and the Near and Middle East. More than 33,000 operators are authorized to use the TIR system and around 1 million TIR transports are carried out per year, according to the United Nations Economic Commission for Europe (UNECE).
The TIR Handbook (several languages)