2016 California Standards for Accessible Design Pocket Guide - Eff. Jan. 1, 2017

11B-308.1.1 Electrical switches.

Controls and switches intended to be used by the occupant of a room or area to control lighting and receptacle outlets, appliances or cooling, heating and ventilating equipment, shall comply with Section 11B-308 except the low reach shall be measured to the bottom of the outlet box and the high reach shall be measured to the top of the outlet box.