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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 420 — Car Handling Information

The 420 carries car-handling instructions between rail carriers: switching, spotting, holding, sorting, classification orders.

Purpose

The 420 documents operational instructions between an issuing carrier and a receiving carrier or yard operator: car move within yard, industrial spot at a private consignee siding, classification, holding. It is the B2B instrument for rail handling operations.

It triggers downstream billing transactions (424 — Rail Carrier Services Settlement) and feeds yard-management operational systems. Acknowledged by 997, its operational accuracy drives correct accessorial billing.

Envelope structure

The 420 travels within the three X12 envelope levels (ISA/IEA, GS/GE with functional group CH, and ST/SE). Didactic example in release 004010:

x12 example-420.x12 
ISA*00*          *00*          *ZZ*BNSF          *ZZ*UPRR          *260514*0830*U*00401*000000420*0*P*>~
GS*CH*BNSF*UPRR*20260514*0830*1*X*004010~
ST*420*0001~
ZD*ZZ*WB-26-44071*BNSF*HOPPER*BNSF-552032*RX*LD*20260514~
N7*HOPPER*BNSF-552032*LD~
N1*CA*BNSF RAILWAY*92*BNSF~
N1*CA*UNION PACIFIC*92*UPRR~
M7*CL*M7TYPE~
LX*1~
DTM*010*20260515~
MSG*Spot at ACME MILL INC private siding KC-22~
SE*9*0001~
GE*1*1~
IEA*1*000000420~

Common segments

  • Header — ST, ZD (Beginning Segment for Car Handling), DTM.
  • Equipment — N7 with LD / MT status and equipment type.
  • Parties — N1*CA issuer / receiver.
  • Action — LX loop with DTM (action date), MSG (instruction).
  • Summary — SE.

Common pitfalls

  • Action code: ZD element 01 must carry the exact action code (spot, hold, classify) — a generic code prevents yard-operator planning.
  • Siding identifier: encode the private siding via an AAR code or a receiver-known local identifier; a free-text name in MSG is ignored by automated systems.
  • Operational timing: DTM must reflect a realistic operational window — a past-dated DTM triggers an 824 rejection.

Documentation

The code 420 and the name Car Handling Information 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.