law: Trade Marks Act, 1999  
  59. Alteration of registered trade marks. – 
  (1) The registered proprietor of a trade mark
  
  may apply in the prescribed manner to the Registrar for leave to add to or
  
  alter the trade mark in any manner not substantially affecting the identity
  
  thereof, and the Registrar may refuse leave or may grant it on such terms and
  
  subject to such limitations as he may think fit.
  (2) The Registrar may cause an application
  
  under this section to be advertised in the prescribed manner in any case where
  
  it appears to him that it is expedient so to do, and where he does so, if
  
  within the prescribed time from the date of advertisement any person give
  
  notice to the registrar in the prescribed manner of opposition to the
  
  application, the Registrar shall, after hearing the parties if so required,
  
  decide the matter.
  (3) Where leave is granted under this section,
  
  the trade marks as altered shall be advertised in the prescribed manner, unless
  
  the application has already been advertised under sub-section (2).