Sequential line number for a lading item.

Code identifying hazardous classification placard notation, and proper endorsement as required by the Federal Railway Administration (See Figures Appendix for possible values to be used for this data element)

Reference number or identification number as defined for a particular Transaction Set, or as specified by the Reference Number Qualifier.

Code qualifying the Reference Number.

Code to identify presence of hazardous substance.

Code to indicate hazardous material that is packaged in limited quantities and is excluded from placarding requirements.