Regulation (EC) No 987 / 2009 of the European Parliament and of the Council of 16 September 2009 , implementation procedure" is an important document, which not only highlights key aspects of European Union legislation, but also serves as a basis for understanding complex processes , related to the enforcement and integration of European norms into the national laws of the member states. This regulation, adopted in 2009, was a significant milestone in the development of the EU legal system and continues to be relevant for specialists in the field of law, economics and international relations. The book is interesting for those who want to better understand the functioning of the European Union, its institutions and procedures. It will be useful to both law and economics students and practicing lawyers, politicians and researchers dealing with European integration. Insofar as the regulation addresses issues relating to the rights and obligations of citizens, as well as the interaction between Member States,