California Code, Business and Professions Code - BPC § 17031

Locality discrimination means a discrimination between different sections, communities or cities or portions thereof, or between different locations in such sections, communities, cities or portions thereof in this State, by selling or furnishing an article or product, at a lower price in one section, community or city, or any portion thereof, or in one location in such section, community, or city or any portion thereof, than in another.