Article 3
1. The computerised system shall be made up of Union and non-Union components. 2. The Commission shall ensure that in work on the Union components of the computerised system every attention is paid to reusing existing systems as much as possible and ensuring that the computerised system is compatible with other relevant Commission and Member State computerised systems, with the objective of creating an integrated set of computerised systems for the surveillance both of intra-Union movements of excise goods and of movements of excise goods and goods subject to other duties and charges coming from or going to third countries. 3. The Union components of the computerised system shall be the common specifications, the technical products, the services of the Common Communications Network/Common Systems Interface network, and the coordination services used by all the Member States, to the exclusion of any variant or special feature of any such services designed to meet national requirements. 4. The non-Union components of the computerised system shall be the national specifications, the national databases forming part of the computerised system, network connections between the Union and non-Union components and any software or equipment which a Member State considers necessary to ensure full use of the computerised system throughout its administration.