Key legal question
Whether the appellants were entitled to inspect correspondence between Swiss authorities and the Russian authorities and the case file index
Extracted holding
Yes. The correspondence was not internal administrative material, and the file index was necessary to protect the appellants' interests in the assistance proceedings.
Extracted reasoning
The letters were addressed to an خارجی authority and could help understand the supplementary requests and verify that no information had been transmitted prematurely. The index was needed to identify all relevant file material and check whether the request for access was complete.