December 1992 agreement reached at a European Council meeting in Edinburgh, Scotland, that granted Denmark four exceptions to the Maastricht Treaty
Resolved Denmark's rejection of the Maastricht Treaty by granting four opt-outs, enabling EU ratification to proceed.
Key Facts
- Date
- December 1992
- Number of opt-outs granted
- 4
- Denmark's first referendum result
- Rejected Maastricht Treaty (1992)
- Second referendum result
- Ratified Maastricht Treaty (1993)
- Defence opt-out abolished
- 1 June 2022 referendum
- Euro opt-out referendum
- Rejected abolition in 2000
By the Numbers
Location
Cause → Event → Consequence
Denmark rejected the Maastricht Treaty in a 1992 referendum, threatening the treaty's entry into force since all EU member states were required to ratify it. Danish concerns centred on sovereignty in monetary union, defence, justice, and citizenship, making unconditional ratification politically untenable.
At a European Council meeting in Edinburgh in December 1992, member states agreed to grant Denmark four formal opt-outs from the Maastricht Treaty. These concerned Economic and Monetary Union, the Common Security and Defence Policy, Justice and Home Affairs, and EU citizenship, and were codified in the Edinburgh Agreement.
With the opt-outs secured, Danish voters approved the Maastricht Treaty in a second referendum in 1993, allowing the treaty to enter into force across the EU. The opt-outs remained largely in place for decades, though Denmark abolished the defence opt-out by referendum in June 2022, and the citizenship opt-out was effectively nullified by the Amsterdam Treaty.
Political Outcome
Denmark granted four opt-outs from the Maastricht Treaty; Denmark subsequently ratified the treaty in a 1993 referendum, enabling EU-wide entry into force.
Denmark had rejected Maastricht Treaty; EU ratification process stalled
Denmark ratified treaty with opt-outs; Maastricht Treaty entered into force EU-wide