High Quality Content by WIKIPEDIA articles! The Anti-Terrorism, Crime and Security Act 2001 was formally introduced into the Parliament of the United Kingdom on 19 November 2001, two months after the terrorist attacks on New York on 11 September. It received royal assent and came into force on 14 December 2001. Many of its measures are not specifically related to terrorism, and a Parliamentary committee was critical of the swift timetable for such a long Bill including non emergency measures.