law: Companies Act, 1956
  Sec 31    -    
  
  Alteration of articles by special resolution.
  (1) Subject to the provisions of this Act and
  
  to the conditions contained in its memorandum, a company may, by special
  
  resolution, alter its articles:
  Provided  that no alteration made in the articles
  
  under this sub-section which has the effect of converting a public company into
  
  a private company, shall have effect unless such alteration has been approved
  
  by the Central Government.
  (2) Any alteration so made shall, subject to
  
  the provisions of this Act, be as valid as if originally contained in the
  
  articles and be subject in like manner to alteration by special resolution.
  (2A) Where any alteration such as is referred
  
  to in the proviso to sub-section (1) has been approved by the Central
  
  Government, a printed copy of the articles as altered shall be filed by the
  
  company with the Registrar within one month of the date of receipt of the order
  
  of approval.
  (3) The power of altering articles under this
  
  section shall, in the case of any company formed and registered under Act No.
  
  19 of 1857 and Act No. 7 of 1860 or either of them, extend to altering any
  
  provisions in Table B annexed to Act 19 of 1857, and shall also, in the case of
  
  an unlimited company formed and registered under the said Acts or either of
  
  them, extend to altering any regulations relating to the amount of capital or
  
  its distribution into shares, notwithstanding that those regulations are
  
  contained in the memorandum.