Position
Element
Name
Type
Requirement
Min
Max
Repeat
RDD01
Standard Carrier Alpha Code
Identifier (ID)
Mandatory
2
4
1
Code identifying the Standard Carrier Alpha Code
RDD02
Rule 260 Junction Code
Identifier (ID)
Optional
1
5
1
Code indicating railroad interchange locations
RDD03
Standard Carrier Alpha Code
Identifier (ID)
Conditional
2
4
1
Code identifying the Standard Carrier Alpha Code
RDD04
Rule 260 Junction Code
Identifier (ID)
Optional
1
5
1
Code indicating railroad interchange locations
C0403: If RDD-04 is present, then RDD-03 is required
RDD05
Assigned Number
Numeric (N0)
Optional
1
9
1
Number assigned for differentiation within a transaction set