A defect in a prescribed fire safety installation for a building is a critical defect if--
(a) the defect is likely to render the installation inoperable; and
(b) the defect is reasonably likely to have a significant adverse impact on the safety of occupants of part or all of the building if a fire or hazardous materials emergency happens.
Examples of critical defects--
a defect making a fire detection and alarm system inoperable
a defect in a pump making the fire hydrants for a building inoperable
Example of a defect that is not a critical defect--
a defect that makes inoperable only 1 of several standard fire extinguishers in a part of a building