law: Hindu Marriage Act, 1955
  5. Conditions for a Hindu marriage.-
  A marriage may be solemnized between any two Hindus, if the
  
  following conditions are fulfilled, namely:-
  (i) neither party has a spouse living at the time of the marriage;
  (ii) neither party is an idiot or a lunatic at the time of the
  
  marriage;
  (iii) the bridegroom has completed the age of eighteen years and
  
  the bride the age of fifteen years at the time of the marriage;
  (iv) the parties are not within the degrees of prohibited
  
  relationship, unless the custom or usage governing each of them permits of a
  
  marriage between the two;
  (v) the parties are not sapindas of each other, unless the
  
  custom or usage governing each of them permits of a marriage between the two;
  (vi) where the bride has not completed the age of eighteen
  
  years, the consent of her guardian in marriage, if any, has been obtained for
  
  the marriage.