Paragraph 4 Determination of the 1969 standard

to the portion of the increasable rate of the pension allocated under paragraph 3 to each period specified in paragraph 1 beginning before 1 April 1969 there shall be applied the multiplier given in Schedule 1 to the Act for a pension treated as beginning at the date when the period began; except that for the period specified in paragraph 1(a) the multiplier shall be that for a pension treated as beginning at the last relevant date before the commencement of the period of contributory service; and

the products of each calculation under sub-paragraph (a) shall be added together to obtain the 1969 standard.