law: Workmen's Compensation Act, 1923 
  24. Appearance of parties 
  Any appearance application or act required to be made or done by
  
  any person before or to a Commissioner (other than an appearance of a party
  
  which is required for the purpose of his examination as a witness) may be made
  
  or done on behalf of such person by a legal practitioner or by an official of
  
  an Insurance company or a registered Trade Union or by an Inspector appointed
  
  under sub-section (1) of section 8 of the Factories Act 1948 (63 of 1948) or
  
  under sub-section (1) of section 5 of the Mines Act 1952 (35 of 1952) or by any
  
  other officer specified by the State Government in this behalf authorized in
  
  writing by such person or with the permission of the Commissioner by any other
  
  person so authorized.