Cal. Water Code § 81671.5

If the proceeds of bonds issued by the authority are made available for use on projects described in subdivision (a) of Section 81658, with the agreement and consent of San Francisco as required by subdivision (b) of Section 81658, San Francisco may not, for as long as those bonds are outstanding, sell, lease, or otherwise transfer title to, or control over, any facility used for the storage, transmission, or treatment of water to any private person or corporation.