(1) Where one or more non - contributory units of pension are applicable in relation to a contributor at the time of his retirement, the contributor is, subject to this Act, upon retirement, entitled to receive, in addition to a pension under section 43:
(a) if he retires on or after attaining the age of sixty - five years--a pension according to the number of non - contributory units of pension that were applicable in relation to him at the time of his retirement; or
(b) if he retires before attaining that age--a pension equal to five - sevenths of the pension that he would, upon retirement, have been entitled to receive in respect of the non - contributory units of pension that were applicable in relation to him at the time of his retirement if he had been a contributor for those units from the respective dates as from which those units became applicable in relation to him as non - contributory units and he had contributed at the appropriate rates based on a retiring age of sixty - five years.
(2) This section does not apply to a contributor who retires on or after 1 July 1976.