UN R155 (vehicle cybersecurity and CSMS)
UN Regulation No. 155, uniform provisions concerning the approval of vehicles with regards to cybersecurity and cybersecurity management system
Applies since 6 July 2022 — in application as of 12 November 2026
Para. 6.7 (CSMS certificate valid for a maximum of three years), para. 7.2.2.2 (CSMS processes, incl. (e) testing), para. 7.3.3 (exhaustive risk assessment against Annex 5 Part A), para. 7.3.6 (testing before approval)
In force since 22 January 2021. In the EU, Regulation (EU) 2019/2144 Annex II row D4 refuses EU type-approval to new vehicle types without it from 6 July 2022 and prohibits registration of new vehicles without it from 7 July 2024. The mandate is already running; the timing that matters is the cycle: a Certificate of Compliance for a CSMS is valid for a maximum of three years from deliverance (para. 6.7) and the Approval Authority may verify at any time that the requirements continue to be met (para. 6.8). ISO/SAE 21434:2021 (Edition 1, published August 2021, under systematic review) is the engineering standard those audits lean on and is not a regulation.
- What Provael supports
- Adversarial-robustness measurements on a learned policy, held by a Cyber Security Management System as one input among many: the likelihood column for the learned component's rows of the para. 7.3.3 risk assessment, one test in the para. 7.3.6 set, one record of a para. 7.2.2.2(e) testing process.
- What it does not establish
- No type approval, no CSMS certificate, no conformity position under R155 or ISO/SAE 21434; not legal advice. Type approval is granted by a type-approval authority against a CSMS. Simulation only; zero real-hardware results.
- Who is responsible
- Vehicle manufacturer holding the CSMS certificate and filing the vehicle-type evidence with the Approval Authority.
UN R155 (vehicle cybersecurity and CSMS), 6 July 2022 — Primary source UN R155 (vehicle cybersecurity and CSMS) — Secondary source UN R155 (vehicle cybersecurity and CSMS), 6 July 2022 — Provael crosswalk verified 2026-09-19