Since 1990 the German Lander have enjoyed unprecedented success in the
ir longstanding quest to influence the European policy process. They w
ere able to leave a clear stamp on the text of the Maastricht Treaty,
to achieve domestic constitutional changes which secured for them a co
ntinuing and, in some fields, decisive role in the German European pol
icy process, and to make significant progress in attracting regional '
allies' from other federal or decentralized member states. The effects
have been to reduce the freedom of manoeuvre of the German central go
vernment in Europe, to deepen the complexity of European policy-making
in both Germany and 'Brussels', and, arguably, to give fuller meaning
to a 'third', sub-national level in EU affairs.