California Family Code
Family Code section 771
771
(a) The earnings and accumulations of a spouse and the minor children
living with, or in the custody of, the spouse, after the date of separation
of the spouses, are the separate property of the spouse.
(b) Notwithstanding subdivision (a), the earnings and accumulations of an unemancipated minor child related to a contract of a type described in Section 6750 shall remain the sole legal property of the minor child.