The text of Article 18 is ambiguous: he is restricting the activities of the intelligence services but seems to allow interception activities by a Member State in another Member State without the latter' s prior authorisation.
Teksten i artikel 18 er uklar. Den begrænser efterretningstjenesternes aktiviteter, men ser ud til at tillade, at en medlemsstat kan foretage aflytning på en anden medlemsstats område uden dennes forudgående godkendelse.