Native law and custom, including the personal law relating to marriage,

13. Native law and custom, including the personal law relating to marriage, divorce, guardianship, maintenance, adoption, legitimacy, family law, gifts or succession, testate or intestate; registration of adoptions under native law or custom; the determination of matters of native law or custom; the constitution, organization, and procedure of native courts (including the right of audience in such courts), and the jurisdiction and powers of such courts, which shall extend only to the matters included in this paragraph and shall not include jurisdiction in respect of offences except in so far as conferred by federal law.