Section 18(8)(i) in Bihar Inter-State Migrant Workmen (Regulation of Employment and Conditions of Service) Rules, 1980
(i)Where an appeal has been dismissed under sub-rule (7), the appellant may apply to the Appellate Officer for re-admission of the appeal, and where it is proved that he was prevented by any sufficient cause from appearing when appeal was called on for hearing, the Appellate Officer shall restore the appeal on its original number.