(2) It is immaterial that sexual intercourse took place with the consent of the other person. (3) Where a person is convicted of an offence under this section in relation to a person under the age of twenty-one years, the court may divest the offender of all authority over that person, and if the offender is the guardian of such person the court may order the termination of the guardianship and appoint another person as guardian. (4) The High Court may, at any time, vary or rescind an order made under subsection (3) by the appointment of any other person as a guardian or in any other respect. 150. Test of relationship. In section 149, the expressions “brother” and “sister” respectively include half-brother and half-sister, and the section shall apply whether the relationship between the person charged with an offence and the person with whom the offence is alleged to have been committed is or is not traced through lawful wedlock. 151. Consent to prosecution. No prosecution for an offence under section 149 shall be commenced without the sanction of the Director of Public Prosecutions. CHAPTER XV—OFFENCES RELATING TO MARRIAGE AND DOMESTIC OBLIGATIONS. 152. Fraudulent pretence of marriage. Any person who wilfully and by fraud 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 commits a felony and is liable to imprisonment for ten years. 153. Bigamy. Any person who, having a husband or wife living, goes through a ceremony of marriage which is void by reason of its taking place during the life of such husband or wife commits a felony and is liable to imprisonment for five