California Code, Probate Code - PROB § 3911

(a) The validity of a transfer made in a manner prescribed in this part is not affected by any of the following:

(b) A transfer made pursuant to Section 3909 is irrevocable, and the custodial property is indefeasibly vested in the minor, but the custodian has all the rights, powers, duties, and authority provided in this part, and neither the minor nor the minor's legal representative has any right, power, duty, or authority with respect to the custodial property except as provided in this part.

(c) By making a transfer, the transferor incorporates in the disposition all the provisions of this part and grants to the custodian, and to any third person dealing with a person designated as custodian, the respective powers, rights, and immunities provided in this part.

(d) A person is not precluded from being a custodian for a minor under this part with respect to some property because the person is a conservator of the minor with respect to other property.

(e) A person who is the conservator of the minor is not precluded from being a custodian for a minor under this part because the custodial property has or will be transferred to the custodian from the guardianship estate of the minor. In such case, for the purposes of Section 3909, the custodian shall be deemed to be “an adult other than the transferor.”

(f) In the cases described in subdivisions (d) and (e), with respect to the property transferred to the custodian, this part applies to the extent it would apply if the person to whom the custodial property is transferred were not and had not been a conservator of the minor.