http://www.legislation.gov.uk/ukpga/1973/36/schedule/2/paragraph/14/1999-03-01Northern Ireland Constitution Act 1973An Act to make new provision for the government of Northern Ireland.texttext/xmlenStatute Law Database2017-10-151999-03-01 SCHEDULESSCHEDULE 2 Excepted Matters14Special powers and other provisions for dealing with terrorism or subversion.