The Penal Code, 1860, Chapter XX: OF OFFENCES RELATING TO MARRIAGE
Cohabitation caused by a man deceitfully inducing a belief of lawful marriage
493. Every man who by deceit causes any woman who is not lawfully married to him to believe that she is lawfully married to him and to cohabit or have sexual intercourse with him in that belief, shall be punished with imprisonment of either description for a term which may extend to ten years, and shall also be liable to fine.
Marrying again during lifetime of husband or wife
494. Whoever, having a husband or wife living, marries in any case in which such marriage is void by reason of its taking place during the life of such husband or wife, shall be punished with imprisonment of either description for a term which may extend to seven years, and shall also be liable to fine.
Exception.- This section does not extend to any person whose marriage with such husband or wife has been declared void by a Court of competent jurisdiction,
nor to any person who contracts a marriage during the life of a former husband or wife, if such husband or wife, at the time of the subsequent marriage, shall have been continually absent from such person for the space of seven years, and shall not have been heard of by such person as being alive within that time provided the person contracting such subsequent marriage shall, before such marriage takes place, inform the person with whom such marriage is contracted of the real state of facts so far as the same are within his or her knowledge.
Same offence with concealment of former marriage from person with whom subsequent marriage is contracted
495. Whoever commits the offence defined in the last preceding section having concealed from the person with whom the subsequent marriage is contracted, the fact of the former marriage, shall be punished with imprisonment of either description for a term which may extend to ten years, and shall also be liable to fine.
Marriage ceremony fraudulently gone through without lawful marriage
496. Whoever, dishonestly or with a fraudulent intention, goes through the ceremony of being married, knowing that he is not thereby lawfully married, shall be punished with imprisonment of either description for a term which may extend to seven years, and shall also be liable to fine.
Adultery
497. Whoever has sexual intercourse with a person who is and whom he knows or has reason to believe to be the wife of anather man, without the consent or connivance of that man, such sexual intercourse not amounting to the offence of rape, is guilty of the offence of adultery, and shall be punished with imprisonment of either description for a term which may extend to five years, or with fine, or with both. In such case the wife shall not be punished as an abettor.
Enticing or taking away or detaining with criminal intent a married woman
498. Whoever takes or entices away any woman who is and whom he knows or has reason to believe to be wife of any other man, from that man, or from any person having the care of her on behalf of that man, with intent that she may have illicit intercourse with any person, or conceals or detains with that intent any such woman, shall be punished with imprisonment of either description for a term which may extend to two years, or with fine, or with both.