32In that regard, by virtue of the very nature of regulations and of their function in the system of sources of EU law, the provisions of regulations generally have immediate effect in the national legal systems without it being necessary for the national authorities to adopt measures of application (Case 93/71 Leonesio [1972] ECR 287, paragraph 5, and Case C-278/02 Handlbauer [2004] ECR I-6171, paragraph 25) or without it being necessary for the EU legislature to adopt supplementary legislation.
Source: EUR-Lex, © European Union, 1998-2026. Reuse authorised under Decision 2011/833/EU.