law: Companies Act, 1956
  Sec 57    -     Expert
  
  to be unconnected with formation or management of company. 
  A prospectus inviting persons to subscribe for shares in or debentures
  
  of a company shall not include a statement purporting to be made by an expert,
  
  unless the expert is a person who is not, and has not been, engaged or
  
  interested in the formation or promotion, or in the management, of the company.