Cal. Gov. Code § 56120

Where the principal act of any parent district provides that the boundaries of the parent district shall be automatically changed in the event of a change in the boundaries of a member district, or that the boundaries of the parent district may be concurrently changed with a change in the boundaries of a member district, the boundaries of the parent district shall be deemed to be automatically, or may be concurrently, changed as the case may be, when proceedings are in accordance with the provisions of the principal acts of any parent district, upon completion of a change of organization or a reorganization changing the boundaries of the member district. The commission of the principal county of the member district shall have exclusive jurisdiction over such a change in boundaries of the member district and also of any parent district subject to this division.