(1) Except as provided in Sentence (2), a fire alarm system shall be installed,
(a) in every building that contains more than 3 storeys, including storeys below the first storey,
(b) where the total occupant load exceeds 300, or
(c) when the occupant load for any major occupancy in Table 9.10.18.2. is exceeded.
(2) A fire alarm system is not required in a residential occupancy where an exit or public corridor serves not more than 4 suites or where each suite has direct access to an exterior exit facility leading to ground level.