4        46 Level DOT Code
6        Airline Tariff 6D
9        Title 49, Code of Federal Regulations (CFR)
A        International Civil Aviation Organization (ICAO) Code
C        Storage Compatibility Group
D        Hazardous Materials ID, DOT
E        Endorsement
F        Air Force Joint Manual 24-204
I        Intergovernmental Maritime Organization (IMO) Code
R        Bureau of Explosives (BOE) 6000 Tariff
T        International Air Transport Association Dangerous Goods Code List
U        United Nations
X        Hazard Class or Division