Thus, areas such as the internal market, social policy, the environment, transport policy, some basic elements of the CAP should come under the codecision procedure while other areas such as Economic and Monetary Union, industry, part of research or the trans-European networks should not.
Ainsi, des domaines tels que le marché intérieur, la politique sociale, l'environnement, la politique des transports, quelques éléments fondamentaux de la PAC, devraient relever de la codécision.