law: Special Marriage Act, 1954 
  24. Void marriages
  (1) Any marriage
  
  solemnized under this Act shall be null and void 19[and may, on a
  
  petition presented by either party thereto against the other party, be so
  
  declared] by a decree of nullity if-
  (i) any of the conditions specified in clauses
  
  (a), (b), (c) and (d) of section 4 has not been fulfilled; or
  (ii) the respondent was impotent at the time
  
  of the marriage and at the time of the institution of he suit.
  (2) Nothing contained
  
  in this section shall apply to any marriage deemed to be solemnized under this
  
  Act within the meaning of section 18, but the registration of any such marriage
  
  under Chapter III may be declared to be of no effect if he registration was in
  
  contravention of any of the conditions specified in clauses (a) to (e) of
  
  section 15 :
  Provided that no such
  
  declaration shall be made in any case where an appeal has been preferred under
  
  section 17 and he decision of the district court has become final.