(2) In any case (a) where the acceptance of such payment in occupation currency was caused by duress or coercion; or (b) where such payment was made after the thirtyfirst day of December 1943, in occupation currency in respect of a pre occupation capital debt, exceeding two hundred and fifty dollars in amount, which (i) was not due at the time of such payment; or (ii) if due, was not demanded by the creditor or by his agent on his behalf and was not payable within the occupation period under a time essence contract; 824 (iii) if due and demanded as aforesaid was not paid within three months of demand or within such extended period as was mutually agreed between the creditor or his agent and the debtor or his agent; or (c). . such payment shall be revalued in accordance with the scale set out in the Schedule to this Ordinance and shall be a valid discharge of such debt only to the extent of such revaluation.