All decorative materials used as the interior finish of every place of assembly shall comply with the A.I.A. codes. All floor coverings shall comply with the requirements of class A or class B stated in A.I.A. Life Safety Code 1970, No. 101. A factory certification or testing laboratory certification reporting the flame spread shall be provided for the bureau of fire prevention files. To secure maximum precautions against fire, the standards of adequacy to be applied shall be the sections of the A.I.A. Life Safety Code applicable thereto. The chief of the bureau of fire prevention may modify the provisions of A.I.A., No. 101 when the requirements would be clearly impractical, but only when reasonable life safety against the hazards of fire, explosion and panic is provided and maintained. (Ord. 483 § 9, 1972).