All buildings, structures, electrical, gas, mechanical or plumbing systems which are
unsafe, unsanitary, or do not provide adequate egress, or which constitute a fire
hazard, or are otherwise dangerous to human life, or which in relation to existing
use, constitute a hazard to safety or health, are considered unsafe buildings or service
systems. All such unsafe buildings, structures or service systems are hereby declared
illegal and shall be abated by repair and rehabilitation or by demolition in accordance
with the provisions of the International Property Maintenance Code, as adopted and
amended by this Code.