What the official record says
This Act is the Taxation (Annual Rates for 2015–16, Research and Development, and Remedial Matters) Act . This Act comes into force on the date on which it receives the Royal assent, except as provided in this section. comes into force on the day after the date on which this Act receives the Royal assent except— to (7) come into force on 1 April 2015: come into force on 1 April 2016: come into force on the date on which this Act receives the Royal assent: come into force on the first day of the month following the month in which this Act receives the Royal assent. come into force on 1 October 1986. come into force on 1 April 1988. come into force on 1 April 1995. come into force on 1 April 1997. comes into force on 10 October 2000. comes into force on 31 March 2005. come into force on 1 Ap