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 regulation 14(4) or (5) of the 1981 regulations or the corresponding provisions of the former regulations,
he is for the purposes of regulation D1 and this Schedule to be treated as having received for any period in respect of which he made such contributions or payment the remuneration which he would have received but for the reduction or discontinuance.