The Pensions Increase (Parliamentary Pensions) Regulations 1972
These Regulations apply the Pensions (Increase) Act 1971 to the pensions of former Members of Parliament subject to the following modifications. In the case of Members whose pensions were awarded under the Ministerial Salaries and Members' Pensions Act 1965 or under section 8 of the Parliamentary and other Pensions Act 1972 (which provides for an alternative calculation of pensions by reference to the 1965 Act), pensions will be treated for pensions increase purposes as having begun on the date (16th October 1964) from which the provisions of the 1965 Act applied, and the increase in each case will be restricted so as to secure that the pension concerned will not exceed the pension that would be awarded to a Member retiring on 31st December 1972 with a similar length of service. In the case of Members who retired under the Parliamentary and other Pensions Act 1972 with pensions based partly on salary before 1st January 1972 and partly on salary after that date, that part of the pension attributable to the pre-1972 salary will be treated for pensions increase purposes as having begun on 16th October 1964, and the increase in each case will be restricted so as to ensure that the pension concerned will not exceed the pension that would be awarded to a Member retiring on 31st December 1972 with a similar length of service. In the case of Members whose pensions are based wholly on salary after 1st January 1972, no increase will be payable.