„ 23(3) Nothing contained in any law shall be held to be in contravention of subsection (1)(a) to the extent that the law in question relates to any of the following matters – (a) adoption, marriage, divorce, burial, devolution of property on death or other matters of personal law; (b) the application of African customary law in any case involving Africans or an African and one or more persons who are not Africans where such persons have consented to the application of African customary law in that case ”