CA Health & Safety Code Section 118900

Within every restaurant in a publicly owned building serving food or alcoholic beverages in rooms whose occupied capacity is 50 or more persons there shall be designated and posted by signs of sufficient number and posted in locations as to be readily seen by persons within the area, a contiguous area of not less than 20 percent of the serving area where the smoking of tobacco is prohibited.

(a)

This section shall not apply to banquet rooms in use for private functions.

(b)

This section shall not apply to premises under lease as a restaurant for the time as the lessee of record on January 1, 1977, has a lease as the operator of the restaurant.

(c)

As used in this section, “restaurant” means any place designated as a restaurant by Section 28522.