6. If during the 13 years ending with the day mentioned in regulation D1(2)(a) the member’s remuneration was reduced or suspended during absence from duty—
(a)if the reduction or discontinuance was by reason of illness or injury, or
(b)if it was otherwise than by reason of illness or injury and he—
(i)made contributions under regulation C5 (leave of absence), C6 (maternity absence) or a payment under regulation C7 (absence due to trade dispute), or
(ii)contributed under section 6(5) of the Act of 1937 (leave of absence etc.) he is for the purposes of regulation D1 and this Schedule to be treated as having received the remuneration which he would have received but for the reduction or discontinuance.