The Authority Having Jurisdiction (AHJ) has the final say on what is permitted. Since the fire door listing agencies (UL, Intertek, Guardian, etc.) have to adhere to NFPA 80, their response is typically that, if an AHJ will accept a door that conflicts with NFPA 80, they also should be able to accept a door without a label.
keywords:fire, door, ultimately, authority, jurisdiction, ahj, underwriters laboratories, UL, WH, NFPA 80