 The opt-outs are outlined in the Edinburgh Agreement and concern the Economic and Monetary Union (EMU), the Common Security and Defence Policy (CSDP), Justice and Home Affairs (JHA) and the citizenship of the European Union.With these opt-outs the Danish people accepted the treaty in a second referendum held in 1993.The EMU opt-out means Denmark is not obliged to participate in the third phase of the European Exchange Rate Mechanism, i.e.