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Recognized Authoritative Agencies. The applicable test procedures of the following agencies are recognized as accepted engineering practice with respect to fire- resistive qualities of materials and assemblies:
American Standards Association (ASA);
American Society for Testing Materials (ASTM);
National Board of Fire Underwriters (NBFU);
National Bureau of Standards, Department of Commerce (NBS);
National Fire Protection Association (NFPA);
Underwriters' Laboratories, Inc. (UL).
(Prior code § 65-3)