Under section 59 of the Social Security and Pensions Act 1975 (c. 60) (increase of official pensions) where the Secretary of State for Work and Pensions, under section 151(1) of the Social Security Administration Act 1992 (c. 5), directs that the sums in section 150(1)(c) of the 1992 Act are to be increased by a specified percentage, the Treasury must make an order to increase the rates in public service pensions. The Pensions (Increase) Act 1971 (c. 56) defines certain terms, sets out when a pension “begins” and how the increase applies to lump sums.