The European Union introduced new fiscal rules through the Treaty on the EMU's Stability, Cooperation, and Governance, aiming to strengthen economic governance. These rules require member states to implement deficit and debt limits in their national legislation. The EU believes that having domestic fiscal rules is crucial for the Economic and Monetary Union's stability. Previous attempts to enforce fiscal rules on a supranational level have been made, but now countries must adopt them at the national level. It is important to assess the effectiveness of these rules to ensure economic stability and prevent overspending.