Section 602.4 of the International Property Maintenance Code is hereby amended and shall read as follows:

602.4 Occupiable work spaces. Indoor occupiable work spaces shall be provided with active or passive space heating systems capable of maintaining an indoor temperature of not less than 68ºF at a point three (3) feet above the floor on the design heating day.

Exceptions: Space heating systems are not required for:

1. Interior spaces where the primary purpose of the space is not associated with human comfort.

2. Group F, H, S or U occupancies.

3. Areas in which persons are primarily engaged in vigorous activities.