Appellate Authority :
It means an authority appointed by the appropriate Government by notification in the Official Gazette, to exercise in such area, as may be specified in the notification the functions of an appellate authority under this Act. [Section 2(a)]
Appropriate Government
“Appropriate Government” means in respect of industrial establishments under the control of the Central Government or a Railway administration or in a major port, mine or oilfield, the Central Government, and in all other cases the State Government:
Provided that where any question arises as to whether any industrial establishment is under the control of the Central Government, that Government may, either on a reference made to it by the employer or the workman or a trade union or other representative body of the workmen or on its own motion and after giving the parties an opportunity of being heard, decide the question and such decision shall be final and binding on the parties. [Section 2(b)]