(3)The [* * *] [ Omitted by Act 21 of 1998, Section 65 (w.e.f. 1.10.1998).] [Commissioner (Appeals)] [ Inserted by Act 29 of 1977, Section 39 and Schedule V (w.e.f. 10.7.1978).] may, admit an appeal after the expiration of the said period if he is satisfied that the appellant had sufficient cause for not presenting it within that period.