Various methods of simplified procedures of approval of hte revisions of the founding treaties of the European Union and also the cooperation on the basis of international agreements between Member States may be motivated by faster realisation of common policies by the EU Member States than in the case of standard negotiation on revisions of EU primary law. The most recent example is the Treaty on Economic Stability, Coordination and Governance in the Economic and Monetary Union, where we may observe constitutional problems in connection with its possible internal approval in the Czech Republic.