of the 5th and the 6th Enlargement: Such negotiations usually involved agreeing transitional periods before new member states needed to implement the laws of the European Union fully and before they and their citizens acquired full rights under the acquis. Terminology The term acquis is also used to describe laws adopted under the Schengen Agreement, prior to its integration into the European Union legal order by the Treaty of Amsterdam, in which case one speaks of the Schengen acquis. The term acquis has been borrowed by the World Trade Organization Appellate Body, in the case Japan – Taxes on Alcoholic Beverages, to refer to the accumulation of General Agreement on Tariffs and Trade (GATT) and WTO law ("acquis gattien"), though this usage is not well established. It has been used to describe the achievements of the Council of Europe (an international organisation unconnected with the European Union): It has also been applied to the body of "principles, norms and commitments" of the Organization for Security and Co-operation in Europe (OSCE): The Organisation for Economic Co-operation and Development (OECD) introduced the concept of the OECD Acquis in its "Strategy for enlargement and outreach", May 2004. See also Official Journal of the European Union Primacy of European Union law References External links EUR-Lex: European Union Law. JRC-Acquis, Aligned multilingual parallel corpus: 23,000 Acquis-related texts per language, available in 22 languages. Total size: 1 Billion words. Translation Memory of the EU-Acquis: Up to 1 Million translation units each, for 231 language pairs. European Union constitutional law