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

11B-219.2 Required systems.

An assistive listening system shall be provided in assembly areas, including conference and meeting rooms.  

[2010 ADAS] 219.2 Required Systems.  In each assembly area where audible communication is integral to the use of the space, an assistive listening system shall be provided.

Exception:  This section does not apply to systems used exclusively for paging, background music, or a combination of these two uses.  

[2010 ADAS] EXCEPTION:  Other than in courtrooms, assistive listening systems shall not be required where audio amplification is not provided.