The requirements for restroom signs in California are derived from both the Federal ADA and the California Building Code.
The sign adjacent to the door, is required by both the ADA and the CBC. Adjacent signs to include pictorial symbol & ISA (tactile not necessary for symbol or ISA) with tactile text and Braille.
CBC 1117B.5.5 ADAAG A4.30.4
For additional information re: Restroom identification signs, please see: http://ashdownarch.com/blog/?p=360
The geometric sign on the door consisting of a circle for women and a triangle for men, is strictly a California requirement.
For additional information re: requirements for California restroom door signs, please see: http://ashdownarch.com/blog/?p=482