2022 California Standards for Accessible Design Guide (effective January 1, 2023)

1009.8.2 Directions.

Directions for the use of the two-way communication system, instructions for summoning assistance via the two-way communication system and written identification of the location shall be posted adjacent to the two-way communication system. Signage shall comply with Chapter 11A, Section 1143A or Section 11B-703.5 requirements for visual characters.