Codecision since Amsterdam: a laboratory for institutional innovation and change

Codecision has dramatically increased the level of interaction and interdependence between the European Parliament and the Council of Ministers. Under Maastricht the two institutions were able to agree on a set of shared norms and rules to manage the interdependence arising from the conciliation procedure. The expansion and simplification of codecision under Amsterdam since May 1999 has started to generate significant strains on the further development of those norms and rules. In particular, it has provoked tension between the competing claims of efficiency and democracy in the framing of legislation. The way in which this is resolved will contribute substantially to the future institutional architecture of the EU