The 1986 organic law unifying the separate uniformed and plainclothes branches of the national police was a major reform that required a considerable period of time to be brought into full effect. The former plainclothes service, known as the Cuerpo Superior de Policía (Superior Police Corps), but often referred to as the "secret police", formerly the Cuerpo General de Policía (General Police Corps), consisted of some 9,000 officers. Prior to 1986, it had a supervisory and coordinating role in police operations, conducted domestic surveillance, collected intelligence, investigated major crimes, issued identity documents, and carried out liaison with foreign police forces.