law: Airports Economic Regulatory Authority of India Act, 2008
  20. Qualifications
  
  for appointment of Chair-person and Members. -
  A person shall not be
  
  qualified for appointment as the Chairperson or a Member of the Appellate
  
  Tribunal unless he-
  a. 
  
   in
  
  the case of Chairperson, is, or has been, a Judge of the Supreme Court or the
  
  Chief Justice of a High Court;
  b. 
  
   in
  
  the case of a Member, has held the post of Secretary to the Government of India
  
  or any equivalent post in the Central Government or the State Government for a
  
  total period of not less than two years in the Ministries or Departments
  
  dealing with aviation or economics or law or a person who is well-versed in the
  
  field of aviation or economics or law.