law: The Chief Election Commissioner and Other Election Commissioners (Conditions of Service) Act, 1991
  4. Term of office.
  The Chief Election
  
  Commissioner or an Election Commissioner shall  hold office  for a term of six
  
  years from the date on which he assumes his office:
  1*["Provided that 
  
  where the  Chief Election  Commissioner or  an Election Commissioner  attains
  
  the  age of sixty-five years before the expiry of  the said  term of  six
  
  years, he shall vacate his office on the date on which he
  
  attains the said age:".]
  Provided further  that
  
  the  Chief  Election  Commissioner  or  an Election Commissioner  may, at  any
  
  time,  by writing  under his  hand addressed to the President, resign his
  
  office. Explanation.—
  For the  purpose of 
  
  this section,  the term of six years in  respect of  the Chief  Election
  
  Commissioner  or an Election Commissioner holding  office immediately  before
  
  the  commencement  of this Act,  shall be  computed from  the date  on which 
  
  he had assumed office.