law: Trade Marks Act, 1999  
  22. Correction and amendment .- 
  The Registrar may, on such terms as he thinks
  
  just, at any time, whether before or after acceptance of an application for
  
  registration under section 18, permit the correction of any error in or in
  
  connection with the application or permit an amendment of the application.
  Provided  that if an amendment – The Registrar
  
  may, on such terms as he thinks just, at any time, whether before acceptance if
  
  it relates to a trade mark to which sub-section (1) of section 9 and
  
  sub-section (1) and (2) of section 11 apply, or in any other case where it
  
  appears to him that it is expedient by reason of any exceptional circumstance
  
  so to do.