Cal. Gov. Code § 37392.1
A city, district, or other public corporation, acting individually or jointly with others, may lease sewers and sewage treatment and disposal facilities, and any land, rights of way, or other property appurtenant thereto, to any other city or to any county, city and county, municipal corporation, public district, sanitation district or other public corporation, or any two or more of them acting jointly, for any term or in perpetuity. A city, district or other public corporation, acting individually or jointly with others, may grant to any other city or to any county, city and county, municipal corporation, sanitation district, public district or other public corporation, or any two or more of them acting jointly, a perpetual right of use, or right of use for any term, in any such facilities, land or other property.
Ca. Gov. Code § 37392.1