California Code, Government Code - GOV § 23266

If the territory proposed to be transferred is uninhabited, no majority protest has been made and the boards of both affected counties approve the proposed boundary change, the proposed boundary change shall be deemed effected pursuant to the general laws of this state from the date of filing of a copy of the resolutions of both boards approving the proposed boundary change with the Secretary of State, and the boards shall also state the effective date or dates upon which the various service responsibilities and functions for the transferred uninhabited territory shall be transferred according to the terms of subdivision (b) of Section 23281.