By what act is the counter-espionage branch Michael John Bettaney worked for bound?
Michael Bettaney: Michael John Bettaney (born 13 February 1950) was an intelligence officer working in the counter-espionage branch of MI5 who was convicted at the Old Bailey in 1984 of offences under section 1 of the Official Secrets Act 1911 after passing sensitive documents to the Soviet Embassy in London and attempting to act as an agent-in-place for the Soviet Union. MI5:  MI5 is directed by the Joint Intelligence Committee (JIC), and the service is bound by the Security Service Act 1989.
Security Service Act 1989