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For the purpose of this Agreement,
a) The term “vehicle” shall mean motor vehicles, articulated vehicles, trailers and semi-trailers, as defined in article 4 of the Convention on Road Traffic of 19 September 1949, other than vehicles belonging to or under the orders of the armed forces of a Contracting Party;
b) The term “dangerous goods” shall mean those substances and articles the international carriage by road of which is prohibited by, or authorized only on certain conditions by, Annexes A and B;
c) The term “international transport” shall mean any transport operation performed on the territory of at least two Contracting Parties by vehicles defined in (a) above.