Acquis

The term acquis, deriving from French, is used in European Union Law to refer to the total body of EU law accumulated so far. The term is also used to describe laws adopted under the Schengen treaty, 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 has also been borrowed by the World Trade Organization Appellate Body, in the case Japan - Taxes on Alcoholic Beverages, to refer to the accumulation of GATT and WTO law, though this usage is not well established.

It has also been used to describe the achievements of the Council of Europe (a body unconnected with the European Union):

The Council of Europe’s acquis in standard setting activities in the fields of democracy, the rule of law and fundamental human rights and freedoms should be considered as milestones towards the great European political project, and the European Court of Human Rights should be recognised as the pre-eminent judicial pillar of any future architecture.

(Section 12, Parliamentary Assembly of the Council of Europe Resolution 1290)