3 Pension increases
1 The pension authority may, if any of the conditions in paragraph (2) are fulfilled, increase the annual rate of an official pension in respect of any period on or after 11th April 2011 as follows—
(a) a pension beginning before 12th April 2010 may be increased by 3.1 per cent of the basic rate (as increased by the amount of any increase under section 1 of the 1971 Act or the existing Orders);
(b) a pension beginning on or after 12th April 2010 and before 11th April 2011 may be increased by 3.1 per cent multiplied by
AB¯
where
(i) A is the number of complete months in the period between the beginning date of the pension and 11th April 2011; and
(ii) B is 12.
2 Those conditions are—
(a) a qualifying condition is satisfied;
(b) the official pension is—
(i) a derivative pension;
(ii) a substituted pension; or
(iii) a relevant injury pension.