law: Trade Marks Act, 1999  
  60. Adaptation of entries in register to
  
  amended or substituted classification of goods or services.- 
  (1) The Registrar shall not make any amendment
  
  of the register which would have the effect of adding any goods or classes of
  
  goods or services to those in respect of which a trade mark is registered
  
  (whether in one or more classes) immediately before the amendment is to be made
  
  or of antedating the registration of a trade mark in respect of any goods or
  
  services.
  Provided  that this sub section, shall not apply
  
  when the Registrar is satisfied that compliance therewith would involve undue
  
  complexity and that the addition or antedating, as the case may be, would not
  
  affect any substantial quantity of goods or services and would not
  
  substantially prejudice the rights of any person.
  (2) A proposal so to amend that register shall
  
  be brought to the notice of the registered proprietor of the trade mark
  
  affected and advertised in the prescribed manner, and may be opposed before the
  
  Registrar by any person aggrieved on the ground that the proposed amendment
  
  contravenes the provisions of sub-section (1).