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Spotlight PEPPOL BIS Billing 3.0 The EU e-invoicing mandate is here — France Sept 2026, Belgium Jan 2026, Germany 2025.

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Foundations

— 02

Standards

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Flagship messages

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Tools

X12 161 — Train Sheet

The 161 carries the rail train sheet: train composition, car order, operational information between rail freight operators.

Purpose

The 161 documents the operational composition of a freight train: train number, locomotive(s), ordered car list with positions, commodity carried, weight, status (loaded / empty), destination per car. It is the B2B instrument between Class I railroads (BNSF, CSX, UP, NS) for operational traceability.

The 161 feeds rail-management systems (TSC — Transportation Service Center) and triggers switching, interchange and billing transactions. Acknowledged by 997, it is a source feed for the 404 (Rail Carrier Shipment Information).

Envelope structure

The 161 travels within the three X12 envelope levels (ISA/IEA, GS/GE with functional group TS, and ST/SE). Didactic example in release 004010:

x12 example-161.x12 
ISA*00*          *00*          *ZZ*BNSF          *ZZ*UPRR          *260514*0600*U*00401*000000161*0*P*>~
GS*TS*BNSF*UPRR*20260514*0600*1*X*004010~
ST*161*0001~
BTS*00*TR-2026-44071*20260514*0600~
N1*CA*BNSF RAILWAY*92*BNSF~
N1*CA*UNION PACIFIC*92*UPRR~
N7*GE-AC4400CW*BNSF-7732~
LX*1~
N7*BOXCAR*BNSF-887741*LD~
M7*CL*M7TYPE~
LX*2~
N7*HOPPER*UPRR-552032*MT~
M7*CL*M7TYPE~
SE*11*0001~
GE*1*1~
IEA*1*000000161~

Common segments

  • Header — ST, BTS (Beginning Segment for Train Sheet), DTM.
  • Operators — N1*CA (issuing carrier), N1*CA (interchange carrier).
  • Locomotives — N7 (Equipment Detail) in leading position.
  • Cars — repeated LX loop: N7 (type / number / status LD or MT), M7 (Seal numbers).
  • Summary — SE.

Common pitfalls

  • Car order: LX01 must reflect physical position in the train; a lost re-ordering breaks loading and braking calculations on the receiving side.
  • LD / MT status: encode loaded vs empty via N7 status element — an unmarked empty car generates an erroneous interchange bill.
  • Seal number: M7 is mandatory for goods under customs custody (HAZMAT, sealed intermodal); without it, the car is quarantined at interchange.

Documentation

The code 161 and the name Train Sheet are public and listed on x12.org/products/transaction-sets. The complete structure of loops, qualifiers and code lists is distributed by DISA via the proprietary Implementation Guides (TR3). ediverse.io covers only public concepts, the envelope and didactic examples.