# Wabtec x Vale (PTC Railway Signaling) revision history

Append-only Arc G field-change log. Forward-only honesty: events accrue from Arc G adoption.

Partnership: [Wabtec x Vale (PTC Railway Signaling)](/partnerships/wabtec-x-vale-ptc-railway-signaling.md)

## Recorded posture

- First recorded event: 2026-07-16
- Last material change: 2026-07-16
- Material event count: 1
- Editorial event count: 0

## Forward-only note

Arc G is forward-only. The event log accrues from the Arc G adoption point. Fields with no events post-baseline equal the current cached value and are not independently verified at any prior date.

_Canonical URL: /partnerships/wabtec-x-vale-ptc-railway-signaling/history. REST: /v1/partnerships/5c69ec59-4357-4d84-9b2d-205e12a0627d/history. HTML: [/partnerships/wabtec-x-vale-ptc-railway-signaling/history](/partnerships/wabtec-x-vale-ptc-railway-signaling/history)._