law: Indian Christian Marriage Act,1872 
  25. Solemnization of marriage
  After the issue of the 
  
  certificate by the Minister, marriage may be solemnized between the persons 
  
  therein described according to such form or ceremony as the Minister thinks fit 
  
  to adopt :
  Provided that the marriage be 
  
  solemnized in the presence of at least two witnesses besides the Minister.