马斯特里赫特条约
The Edinburgh Agreement or Edinburgh Decision is a December 1992 agreement reached at a European Council meeting in Edinburgh, Scotland, that granted Denmark four exceptions to the Maastricht Treaty so that it could be ratified by Denmark. This was necessary because, without all member states of the European Union ratifying it, it could not come into effect. Denmark had first rejected the Maastricht treaty, but with the addition of the Edinburgh Agreement, ratified the treaty in a 1993 referendum. The member states that had already ratified the Maastricht Treaty did not have to do so again.