The Ontario Building Code | Washrooms Required
18.104.22.168. washrooms Required
(2) Where the number of employees in a rapid transit station is not more than five, a washroom containing one water closet and one lavatory is permitted to be used by both sexes provided the door to the room can be locked from the inside.
(3) Where a rapid transit station is not staffed during operating hours, a washroom is not required in the station.
3.13.7. Emergency ventilation