UL Subject 147A
Standard for Nonrefillable (Disposable) Type Fuel Gas Cylinder Assemblies (Bulletin, 7/16/1999)
standard by Underwriters Laboratories, 07/16/1999
UL Subject 991
Standard for Tests for Safety-Related Controls Employing Solid-State Devices (Bulletin, 7/9/1999)
standard by Underwriters Laboratories, 07/09/1999