Calculation of additional membership period
2.—(1) Subject to paragraphs 3 and 4, the additional membership period is—
(a)in a case where the length of the relevant membership period is less than 10 years, a period equal to the length of the relevant membership period; and
(b)in any other case—
(i)the period by which the length of the relevant membership period falls short of 20 years, or
(ii)if longer, 6 243/365 years.
(2) The additional membership period is not to exceed the period by which the member’s period of membership would have been increased if he had continued in the employment which he has ceased to hold until—
(a)he attained the age of 65 years, or
(b)if earlier, the date when his period of membership amounted to 40 years.