translate English to French: In such cases Customs authorities in transit countries could however, in conformity with Article 23 of the Convention, require road vehicles to be escorted at the carriers' expense on the territory of their country.
Dans ce cas les autorités douanières des pays de transit peuvent cependant exiger que, conformément à l'article 23 de la Convention, les véhicules routiers soient escortés aux frais du transporteur sur le territoire de son pays.