Section 3
[Provided that the time fixed by the Court for the correction of the valuation or supplying of the requisite stamp-paper shall not be extended unless the Court, for reasons to be recorded, is satisfied that the plaintiff was prevented by any cause of an exceptional nature from correcting the valuation or supplying the requisite stamp-paper, as the case may be, within the time fixed by the Court and that refusal to extend such time would cause grave injustice to the plaintiff.]