Delete Sections 1203.4.1 and 1203.4.2 in their entirety and replace with the following:

Each under-floor space shall be ventilated by an approved mechanical means or by openings in exterior foundation walls. Such openings shall have a net area of not less than 0.1 square foot for each 150 square feet of under-floor area. There shall be two openings located as close to corners as practical on opposite sides to provide cross ventilation. The openings shall be covered with corrosion resistant wire mesh approximately one-quarter inch in size. All structures with a crawlspace shall have a minimum six mil ground vapor retarder to prevent the flow of water vapor from soils into the heated building interior.