Section 1808.1 of the International Building Code(s) and Section 401.2.1 of the International Residential Code shall be amended to read as follows:

IBC Section 1808.1 and IRC 401.2.1. Footings And Foundations: General. Footings and foundations, unless otherwise specifically provided, shall be constructed of masonry, concrete, or treated wood. In all cases, footings and foundations shall extend below the frost line; the minimum frost line depth shall be 24 inches. Footings of concrete and masonry shall be 24 inches. Footings of concrete and masonry shall be of solid material; any hollow core masonry unit foundation that exceeds twenty-four inches vertical height shall have all cores filled to a minimum of six (6) inches above finish grade with mortar or other material acceptable to the administrative authority. Foundations supporting wood shall extend at least six inches above the adjacent finish grade.