law: Companies Act, 1956
  Sec 24    -     Change
  
  of name of existing private limited companies. 
  (1) In the case of a company which was a
  
  private limited company immediately before the commencement of this Act, the
  
  Registrar shall enter the word "Private" before the word
  
  "Limited" in the name of the company upon the register and shall also
  
  make the necessary alterations in the certificate of incorporation issued to
  
  the company and in its memorandum of association.
  (2) Sub-section (3) of section 23 shall apply
  
  to a change of name under sub-section (1), as it applies to a change of name
  
  under section 21.