law: Companies Act, 2013 
  168.
  
    Resignation
  
  of director.
  1.      A director may resign
  
  from his office by giving a notice in writing to the company and the Board
  
  shall on receipt of such notice take note of the same and the company shall
  
  intimate the Registrar in such manner, within such time and in such form as may
  
  be prescribed and shall also place the fact of such resignation in the report
  
  of directors laid in the immediately following general meeting by the company:
  Provided
  
  that a director shall also forward a copy of his resignation along with
  
  detailed reasons for the resignation to the Registrar within thirty days of
  
  resignation in such manner as may be prescribed.
  1.     
  2.      The resignation of a
  
  director shall take effect from the date on which the notice is received by the
  
  company or the date, if any, specified by the director in the notice, whichever
  
  is later:
  Provided
  
  that the director who has resigned shall be liable even after his resignation
  
  for the offences which occurred during his tenure.
  3.      Where all the
  
  directors of a company resign from their offices, or vacate their offices under
  
  section 167, the promoter or, in his absence, the Central Government shall
  
  appoint the required number of directors who shall hold office till the
  
  directors are appointed by the company in general meeting.