law: Trade Marks Act, 1999  
  21. Opposition to registration.- 
  (1) Any person may, within three months from
  
  the date of the advertisement or re-advertisement of an application for
  
  registration or within such further period, not exceeding one month in the
  
  aggregate, as the Registrar, on application made to him in the prescribed
  
  manner and on payment of the prescribed fee, allows, give notice in writing in
  
  the prescribed manner to the Registrar, of opposition to the registration.
  (2) The Registration shall serve a copy of the
  
  notice on the applicant for registration and, within two months from the
  
  receipt by the applicant of such copy of the notice of opposition, the
  
  applicant shall send to the Registrar in the prescribed manner a
  
  counter-statement of the grounds on which he relies for his application, and if
  
  he does not do so he shall be deemed to have abandoned his application.
  (3) If the applicant sends such
  
  counter-statement, the Registrar shall serve a copy thereof on the person
  
  giving notice of opposition.
  (4) Any evidence upon which the opponent and
  
  the applicant may rely shall be submitted in the prescribed manner and within
  
  the prescribed time to the Registrar, and the Registrar shall give an
  
  opportunity to them to be heard, if they do desire.
  (5) The Registrar shall, after hearing the
  
  parties, if so required, and considering the evidence, decide whether and
  
  subject to what conditions or limitations, if any, the registration is to be
  
  permitted, and may take into account a ground of objection whether relied upon
  
  by the opponent or not.
  (6) Where a person giving notice of opposition
  
  or an applicant sending a counter statement after receipt of a copy of such
  
  notice neither resides nor carries on business in India, the Registrar may
  
  require him to give security for the costs of proceedings before him, and in
  
  default of such security being duly given, may treat the opposition or
  
  application, as the case may be, as abandoned.
  (7) The Registrar may, on request, permit
  
  correction of any error in, or any amendment of, a notice of opposition or a
  
  counter-statement or such terms as he thinks just.