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RegsUP regulatory reference
UN ECE R156 — Software Updates and SUMS · 01
Bring software update governance into approval planning
Launch price valid through 31 December 2026, 23:59 Istanbul time (UTC+3). From 1 January 2027, the regular price is EUR 94.40.
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UN ECE R156
Put this regulation into context.
UN ECE R156: Software releases need an approval perspective as well as a technical one. This edition connects the Software Update Management System with vehicle-level provisions, giving release, engineering and homologation teams a common reference for update discussions.
What you can review
- Software Update Management System
- Software update requirements
- Vehicle-type modifications
Recommended for: software release teams and vehicle approval managers.
Why choose the RegsUP edition?
Work with the regulatory text and the dated RegsUP explanations in the same document. You can consult the provisions, read the included commentary and keep a clearly identified edition in your project records. The scope below shows exactly which publication you are buying.
- Regulatory text: The UN R156 document identified in the edition details below.
- Approval and transition guidance: RegsUP explanations dated 10 October 2026, providing context for the approval questions addressed in this file.
- Manufacturer questions and answers: Practical scenarios with the conditions behind each answer, supporting more informed technical discussions.
- Supporting source extracts: Referenced passages alongside the guidance, helping you follow the basis of the explanation.
Edition and file details
- Regulation
- UN R156
- Regulatory edition
- 01 series
- Document version date
- 4 June 2026
- RegsUP guidance date
- 10 October 2026
- Regulatory text language
- English
- RegsUP guidance language
- English
- Format and length
- Digital PDF · 34 pages, including RegsUP content
- File size
- 0.25 MB
- Product reference
- RU-UN-R156-EN-B1A0EBB9
Before you buy
What does SUMS mean in UN ECE R156?
SUMS stands for Software Update Management System. R156 addresses software updates and their management in the vehicle approval context. Use this edition as a reference when coordinating software-release and homologation work.
Does this PDF also contain the R155 cybersecurity regulation?
No. This product is the stated R156 software-update edition. R155 is a separate cybersecurity document; a link is provided below for teams reviewing both workstreams.
What does this purchase include?
You receive the fixed PDF edition described on this page, personalised for your order. Your download is delivered after payment confirmation and release of the order. Check the stated edition and document language to choose the right reference for your project.
Does this purchase include future updates or a platform subscription?
This is a one-off PDF purchase. It gives you the edition identified here; later editions, continuous monitoring and platform membership are purchased separately.
Is the PDF translated when I change the store language?
No. The store description is available in several languages, but the PDF remains in the document language stated below.
How should this publication be used?
Use this RegsUP publication to support engineering research and approval preparation. It is an editorial reference, not an official publication or an approval certificate. Apply the relevant official provisions and transition conditions when making conformity decisions.
Need to follow changes throughout the year?
If you work with regulations regularly, explore the RegsUP platform for regulatory and emissions calendars, change comparisons, approval and transition dates, and expert and manufacturer Q&A. Choose a subscription that fits your work; platform access and services are separate from this PDF.
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