11- Void marriages.
Any marriage solemnized after the commencement of this Act shall be null and void and may, on a petition presented by either party thereto against the other party, be so declared by a decree of nullity if it contravenes any one of the conditions specified in clauses (i), (iv) and (v) of section 5.
Section 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) at the time of the marriage, neither party-
(a) is incapable of giving a valid consent to it in consequence of unsoundness of mind; or
(b) though capable of giving a valid consent, has been suffering from mental disorder of such a kind or to such an extent as to be unfit for marriage and the procreation of children; or
(c) has been subject to recurrent attacks of insanity or epilepsy;
(iii) the bridegroom has completed the age of [twenty-one years] and the bride the age of [eighteen 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.