House committee substitute to the 1st edition makes the following changes. Adds the following to the conditions that must be met in order for dimension lumber that has not been grade-stamped under the authority of a lumber grading bureau to be used in the construction of one-and two-family dwellings: (1) the lumber conforms with product and inspection standards under American Softwood Lumber Standard PS 20; and (2) the lumber is certified by an inspector who is certified by an accredited independent third-party agency of the American Lumber Standard Committee.