Cal. Veh. Code § 9101

No fees specified in this code, except fees not exempted under Section 9103, need be paid for any vehicle operated by the state, or by any county, city, district, or political subdivision of the state, or the United States, as lessee under a lease, lease-sale, or rental-purchase agreement that grants possession of the vehicle to the lessee for a period of 30 consecutive days or more.