UL Subject 971
Standard for Nonmetallic Underground Piping for Flammable Liquids (Bulletin, 4/11/2000)
standard by Underwriters Laboratories, 04/11/2000
UL Subject 125
Standard for Valves for Anhydrous Ammonia and LP-Gas (Other Than Safety Relief) (Bulletin, 4/5/2000)
standard by Underwriters Laboratories, 04/05/2000
UL Subject 346
Standard for Waterflow Indicators for Fire Protective Signaling Systems (Bulletin, 4/4/2000)
standard by Underwriters Laboratories, 04/04/2000