Cal. Bus. & Prof. Code § 22435.8

This article shall not invalidate an ordinance of, or be construed to prohibit the adoption of an ordinance by, a city, county, or city and county, which ordinance regulates or prohibits the removal of shopping carts or laundry carts from the premises or parking area of a retail establishment except to the extent any provision of such an ordinance expressly conflicts with any provision of this article.