law: Telecom Regulatory Authority of India Act,1997
  4. Qualifications for appointment of
  
  Chairperson and other members
  
  The Chairperson and other members of the Authority shall be
  
  appointed by the Central Government from amongst persons who have special
  
  knowledge of, and professional experience in, telecommunication, industry,
  
  finance, accountancy, law, management or consumer affairs:
  PROVIDED that a person who is, or has been, in the
  
  service of Government shall not be appointed as a member unless such person has
  
  held the post of Secretary or Additional Secretary, or the post of Additional
  
  Secretary and Secretary to the Government of India or any equivalent post in
  
  the Central Government or the State Government for a period of not less than
  
  three years.]