UN R79 Supplement 16 (03 series) · UNECE Regulation No. 79 (ECE R79) — Uniform provisions concerning the approval of vehicles with regard to steering equipment.
UN R79 — Supplement 16 to the 03 series of amendments
Supplement 15 → 16
- What changed
- Any ACSF of Category A must fulfil the requirements of paragraph 5.6.1. unless the vehicle has a DCAS which meets conditions (a) to (c).
- The letter “X” before the approval number now also applies when ACSF of Category A are exempted from the technical requirements under paragraph 5.6.1.
- Paragraph 5.6.1.2.9. now says “through” instead of “trough”.
- Why
- The changes to paragraphs 4.4.3. and 5.6.1. clarify the special provisions for Automated Commanded Steering Functions of Category A.
- Japan proposed the change to paragraph 5.6.1.2.9. as a correction.
Q1What changed9 changes
ACSF of Category A on vehicles with a DCAS (para. 5.6.1.)
Any ACSF of Category A must fulfil the requirements of paragraph 5.6.1. unless the vehicle has a DCAS which meets conditions (a) to (c). Conditions (a) and (b): the DCAS incorporates this function and allows its activation only during operation and as part of DCAS. Condition (c): the DCAS complies with the technical requirements of the original version or later series of amendments of UN Regulation No. 171. The heading now has a capital “P” in “Provisions”. A new RegVault Note explains the text of this paragraph.
Letter “X” for an exempted ACSF of Category A (para. 4.4.3.)
The letter “X” before the approval number now also applies when ACSF of Category A are exempted from the technical requirements under paragraph 5.6.1. Before this supplement, item (a) named only ACSF of Category B1 or C and paragraphs 5.6.2. and 5.6.4. The text of paragraph 4.4.3. now starts with a capital “A”.
Spelling correction (para. 5.6.1.2.9.)
Paragraph 5.6.1.2.9. now has the word “through” where the text said “trough”. No other word of the paragraph changes. The paragraph applies to RCP systems based on detection of driver position and movement.
Q2Why it changed
- Proposed by
- Expert from the United Kingdom (paragraphs 4.4.3. and 5.6.1.) and experts from Japan (paragraph 5.6.1.2.9.)
- Working party
- GRVA, 24th session (January 2026)
Reasons
The changes to paragraphs 4.4.3. and 5.6.1. clarify the special provisions for Automated Commanded Steering Functions of Category A.
Sources (2)
“GRVA reviewed GRVA-24-20 and GRVA-24-40, which clarify the special provisions for Automated Commanded Steering Functions of Category A.”
“GRVA adopted GRVA-24-40 as reproduced in annex VII”
Japan proposed the change to paragraph 5.6.1.2.9. as a correction.
Source
“The representative of Japan introduced a proposal for corrigendum to paragraph 5.6.1.2.9 in the 02, 03, and 04 series of amendments to UN Regulation No. 79 (GRVA-24-25).”
Document trail
- —ProposalGRVA-24-20Proposal from the TF on ADAS for paragraphs 4.4.3. and 5.6.1.
- —ProposalGRVA-24-25Correction proposal from Japan for paragraph 5.6.1.2.9.
- —RevisedGRVA-24-40Updated proposal from the United Kingdom
- —Working party adoptsECE/TRANS/WP.29/GRVA/24Session report, paras. 60 and 63
- 2026-04Sent to WP.29ECE/TRANS/WP.29/2026/77Text that GRVA sent to WP.29 and AC.1
- 2026-06-24WP.29 adoptsECE/TRANS/WP.29/1192Adopted at the 199th session (session report, para. 103)
- PendingIn forceDate not yet known
Q3Who is affected
Vehicle manufacturer
- Find the vehicle types that have an ACSF of Category A and a DCAS. Compare each DCAS with conditions (a) to (c) of paragraph 5.6.1.
- Without a DCAS meeting conditions (a) to (c), make sure the Category A ACSF fulfils the requirements of paragraph 5.6.1.
- Check the letter “X” before the approval number when an ACSF of Category A is exempted under paragraph 5.6.1.
Component supplier
- If you supply a DCAS, tell the vehicle manufacturer whether it meets conditions (a) to (c) of paragraph 5.6.1.
- For condition (c), check which version or series of amendments of UN Regulation No. 171 the DCAS complies with.
Technical service / Approval authority
- If a vehicle with an ACSF of Category A has a DCAS, check the DCAS against conditions (a) to (c).
- Without a DCAS meeting conditions (a) to (c), check that the Category A ACSF fulfils the requirements of paragraph 5.6.1.
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ⓘ This report gives advice only. It is not legal or type-approval advice.
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