The Single European Act (1986)

The Single European Act (SEA), signed in Luxembourg and The Hague and came into force on 1 July 1987, was the first modification of the fundational treaties of the European Communities, that is to say, the Treaty of Paris in 1951 and the Treaties of Rome in 1957.

Jacques Delors, president of the European Commission, summarised the main objectives of the Single European Act in the following way: The Single Act means, in a few words, the commitment of implementing simultaneously the great market without frontiers, more economic and social cohesion, an European research and technology policy, the strengthening of the European Monetary System, the beginning of an European social area and significant actions in environment

Reference : http://www.historiasiglo20.org/europe/acta.htm