Cal. Bus. & Prof. Code § 13421

Every person, firm, partnership, association, trustee, or corporation which owns, leases, or rents and operates a gasoline service station or other facility which offers gasoline or other motor vehicle fuel for sale to the public from such a facility abutting or adjacent to a street or highway shall turn off all outdoor lighted advertising media at their place of business when they are not open for business. This section shall only apply to the service station and not the retail business in a situation where gasoline service station or other facility is a part of and adjacent to a retail business provided the retail sale of gasoline or other motor vehicle fuel is not the primary purpose of that business.