The Legal act domain authority file lists the various abbreviations of domains such as EC, EU, Euratom and CFSP, representing the sphere of action of the European Union and its predecessors, and used for numbering of EU legal acts. These domains have changed over the years as new treaties and amendments to the Treaties have been adopted. This authority file was created to be used by EUR-Lex and Cellar. It provides an authority code, the start date and end date, if applicable, of each domain and labels in all official EU languages.
The Legal act domain authority file is maintained by the Publications Office of the European Union on EU Vocabularies website.