The term “major repair,” for the purposes of identifying construction subject to the Prevailing Wage Law, means: the restoration of a facility to such a condition that it may be effectively utilized for its designated purpose. The repair is done by overhaul or replacement of major constituent parts that have deteriorated. Replacing roof, tuck-pointing buildings and replacing air conditioning compressors are example of repairs. If the size, type or extent of the existing facilities is changed or increased, the work performed shall constitute construction submit to the Prevailing Wage Law. A project shall be considered to be maintenance work, as opposed to major repair subject to the Prevailing Wage Law, if the maintenance is the recurrent, day-to-day, periodic or scheduled work required to preserve or immediately restore a facility to such a condition that it can be effectively used for its designed purpose by repair but not replacement; and the size, type or extent of the existing facility is not changed.