(1) Wood exposed to soil or air above the lowest anticipated groundwater table shall be treated with preservative in conformance with CAN/CSA-O80 Series, “Wood Preservation”, and the requirements of the appropriate commodity standard as follows:
(a) CAN/CSA-O80.2, “Processing and Treatment”,
(b) CAN/CSA-O80.3, “Preservative Formulations”, or
(c) CSA O80.15, “Preservative Treatment of Wood for Building Foundation Systems, Basements, and Crawl Spaces by Pressure Processes”.