Section 12 of the Hindu Minority and Guardianship Act, 1956 applies when minor has:

Section 12 of the Hindu Minority and Guardianship Act, 1956 applies where a minor has "an undivided interest" in joint family property that is under the management of an adult member of the family. Property the minor inherits, earns or receives on a completed partition is his separate property, for which a guardian may be appointed in the ordinary way.