Under section 59 of the Social Security and Pensions Act 1975 (c. 60) where the Secretary of State for Work and Pensions, under the Social Security Administration Act 1992 (c. 5), directs the sums in section 150(1)(c) are increased by a specific percentage, the Treasury shall provide by order for the increase in the rates of 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.