Provided that the appellate authority may entertain an appeal under this sub-section after the expiry of the aforesaid period if it is satisfied that the appellant was prevented by sufficient cause from preferring the appeal within such period.
(2)
After the receipt of an appeal under sub-section (1), the appellate authority may, after giving the appellant, the employer referred to in sub-section (5) of section 3-B and the registering officer an opportunity of being heard in the matter, dispose of the appeal as expeditiously as possible.