id	definition
C	Minimum Charge per Carload or Trailer
D	Department of Defense Unique Freight Class
E	Rate per Unit Applicable only to Units in Excess of a Specific Threshold Amount
F	Department of Defense Freight All Kinds, Class 100
L	LTL (Less Than Truckload) Rate
M	Minimum Charge
N	No Rate for This Application
P	Percent of Minimum Charge
R	Rate per unit subject to minimum units specified, if any
S	Minimum Charge per Shipment
T	TL (Truckload) Rate