Cal. Streets and Highways Code § 229.29

In order to be eligible for a generic tourist oriented directional sign, an individual business or, if more than one business is to be included, then a majority of the businesses and attractions within 10 driving miles of the sign, shall conform to all of the following: (a) Open to the public at least 40 hours per week and six days per week, for a minimum of three continuous months per year, and maintain regular hours and schedules. (b) Seasonal businesses and attractions closed more than one week at a time shall have the sign covered or removed by the department during the period of closure. (c) Possess any appropriate business license approved by the state and local agency regulating the particular business. (d) Each business or attraction identified on a tourist oriented directional sign shall provide assurance of its conformity with all applicable laws concerning the public accommodation without regard to race, color, sex, culture, social origin or condition, or political or religious ideas.