In Canada we have the National Building Code (NBC) and each province has its own building code. Most provinces incorporate some, but not necessarily all, provisions of the National Building Code (NBC).
Clause 22.214.171.124 in the NBC code applies to Assistive Listening System (ALS) and states:
In a building of assembly occupancy, all classrooms, auditoria, meeting rooms and theatres with an area of more than 100m2 shall comply with Sentence (2). Except as permitted by Sentence (2), rooms described in Sentence (1) in a building of assembly occupancy, all classrooms, auditoria, meetings rooms and theatres with an area of more than 100m2 shall be equipped with an ALS encompassing the entire seating area. If the ALS required by Sentence (1) is an induction loop system (ILS), only half the seating area in the room need be encompassed.
The BC Building Code is based on the NBC, and has a special section on accessibility. This is available online:
If you require more information, the complete BC Building Code book is available for reference free of charge at public libraries.
I am a member of the Canadian National Hard of Hearing Association (CNHofHH) without any authority. I do not know who monitors any building being built in Salmon Arm or anywhere in B.C.