(1) Panel-type underlay shall be not less than 6 mm thick and shall conform to,
(a) ANSI A208.1, “Particleboard”,
(b) CAN/CGSB-11.3-M, “Hardboard”,
(c) ANSI/HPVA HP-1, “Hardwood and Decorative Plywood”,
(d) CSA O121, “Douglas Fir Plywood”,
(e) CSA O151, “Canadian Softwood Plywood”,
(f) CSA O153, “Poplar Plywood”, or
(g) CSA O437.0, “OSB and Waferboard”.