The Ontario Building Code | Voice Communication System
22.214.171.124. Voice Communication System
(1) A voice communication system conforming to Article 126.96.36.199. shall be provided in a building if,
(a) the floor of the top storey is more than 36 m above grade,
(c) a floor areaor part of a floor area located more than 18 m above grade is designed or intended for use as a retirement home regulated under the Retirement Homes Act, 2010 that is a Group C occupancy.