6 Any State which is a party to a convention concerning international through carriage of goods by rail comparable with these Uniform Rules may, when it makes an application for accession to the Convention, declare that it will apply these Uniform Rules only to carriage performed on part of the railway infrastructure situated on its territory. This part of the railway infrastructure must be precisely defined and connected to the railway infrastructure of a Member State. When a State has made the above-mentioned declaration, these Uniform Rules shall apply only on the condition