The Member States 25 March 1957, Consolidated version of the Treaty establishing the European Atomic Energy CommunityTITLE IV - Specific financial provisionsArticle 182

3. Appropriations for research and investment shall be classified under different chapters grouping items of expenditure according to their nature or purpose and subdivided, as far as may be necessary, in accordance with the regulations made pursuant to Article 322 of the Treaty on the Functioning of the European Union. 4.