Cal. Business and Professions Code § 22435.10

As used in this article: (a) “In the business of shopping cart or laundry cart retrieval” means to search for, gather, and restore possession to the owner, or an agent thereof, for compensation or in expectation of compensation, of shopping carts or laundry carts located outside the premises or parking area of a retail establishment. (b) “Shopping cart” means a basket which is mounted on wheels or a similar device generally used in a retail establishment by a customer for the purpose of transporting goods of any kind. (c) “Laundry cart” means a basket which is mounted on wheels and used in a coin-operated laundry or drycleaning retail establishment by a customer or an attendant for the purpose of transporting fabrics and the supplies necessary to process them. (d) “Parking area” means a parking lot or other property provided by a retailer for use by a customer for parking an automobile or other vehicle.