The Treaty authority table (AT) is a controlled vocabulary listing the different EU treaties, including treaties and protocols, accession treaties, Schengen Convention and Charter of Fundamental Rights. The Treaty AT is part of the Core Metadata used in the exchange between the institutions involved in the legal decision-making process and the Publications Office of the European Union. It is also used by EUR-Lex. It provides an authority code, the start-use date of the concept and labels in all official EU languages. The Treaty AT is under governance of the Interinstitutional Metadata Maintenance Committee (IMMC) and maintained by the Publications Office of the European Union on EU Vocabularies website.