The Security Service, commonly known as MI5 (Military Intelligence, Section 5), is the United Kingdom's counter-intelligence and security agency and is part of the intelligence machinery alongside the Secret Intelligence Service (SIS or MI6), Government Communications Headquarters (GCHQ) and the Defence Intelligence Staff (DIS). All come under the direction of the Joint Intelligence Committee (JIC). The service has a statutory basis in the Security Service Act 1989 and the UK Intelligence Services Act of 1994. Its remit includes the protection of British parliamentary democracy and economic interests, counter-terrorism, counter-intelligence, and counter-espionage within the UK. While mainly concerned with internal security, it does have an overseas role in support of its mission.