California Code, Probate Code - PROB § 19503

(a) Except as otherwise provided in subdivisions (b) and (c), this part applies to an express trust that is irrevocable or revocable by the settlor only with the consent of the trustee or a person holding an adverse interest.

(b) This part does not apply to a trust held solely for charitable purposes.

(c) Subject to Section 19515, a trust instrument may restrict or prohibit exercise of the decanting power.

(d) This part does not limit the power of a trustee, powerholder, or other person to distribute or appoint property in further trust or to modify a trust under the trust instrument, law of this state other than this part, common law, a court order, or a nonjudicial settlement agreement.

(e) This part does not affect the ability of a settlor to provide in a trust instrument for the distribution of the trust property or appointment in further trust of the trust property or for modification of the trust instrument.