UN R145 Supplement 2 (01 series) · UNECE Regulation No. 145 (ECE R145) — Uniform provisions concerning the approval of vehicles with regard to ISOFIX anchorage systems ISOFIX top tether anchorages and i-Size seating positions.
UN R145 — Supplement 2 to the 01 series of amendments
Supplement 1 → 2
- What changed
- The Regulation now accounts for vehicles of category X and does not apply to vehicles of category Y.
- For category X vehicles, paragraph 2.5. takes the "R" point of the most forward passenger seat instead of the driver's R-point.
- An anti-rotation device for ISOFIX semi-universal child restraint systems now includes any other means intended to limit restraint rotation during a frontal impact.
- Why
- The Regulation was first written for vehicles with a driver and manual driving controls.
- The amendment intends to keep the Regulation's spirit and to extend it to vehicles without a driver and without manual driving controls inside the vehicle.
- WP.29 aimed to adopt all documents of the review of existing UN Regulations for Automated Driving Systems (ADS) at its June 2026 session.
Q1What changed13 changes
Introduction and scope for vehicles of categories X and Y (section 0., paras. 1.1. and 1.2.)
New section 0. says that the Regulation is amended to account for vehicles of category X. New paragraph 1.2. says that the Regulation does not apply to vehicles of category Y. Without a driver or manual driving controls in the vehicle, related provisions must not be taken into account unless this amendment already covers them. For vehicles with an Automated Driving System (ADS) other than vehicles of category X, no special provisions or exemptions apply in the manual driving mode. In a mode where an ADS feature is active, the relevant ADS requirements apply. The text under the heading of section 1. is now paragraph 1.1., and item (a) has a call to footnote 1 after "M1".
Front passenger seat for vehicles of category X (para. 2.5.)
Front passenger seats are seats whose "foremost H point" is in or in front of the vertical transverse plane through the driver's R point. Now, for vehicles of category X, the "R" point of the most forward passenger seat must be taken instead of the driver's R-point. The rest of the definition does not change.
Anti-rotation device for ISOFIX semi-universal child restraint systems (para. 2.15., item (b))
In item (b) of paragraph 2.15., the anti-rotation device for an ISOFIX semi-universal child restraint system now also covers "any other means". The item ends "intended to limit the rotation of the restraint during a frontal impact", as before. Before, it consisted of either a top tether, the vehicle dashboard or a support leg.
ISOFIX fixtures defined in UN Regulations Nos. 16 or 173 (para. 5.3.1.)
The third paragraph of paragraph 5.3.1. now refers to the ISOFIX fixtures defined in UN Regulations Nos. 16 or 173. Their type and number that can be installed on each ISOFIX position are defined in UN Regulations Nos. 16 or 173. Before, both places referred to UN Regulation No. 16.
R.E.3 references in footnotes 1 and 2 (section 0., para. 4.4.1.)
New footnote 1 refers to the definitions in the Consolidated Resolution on the Construction of Vehicles (R.E.3.), document ECE/TRANS/WP.29/78/Rev.8. The footnote to paragraph 4.4.1. says where the distinguishing numbers of the Contracting Parties to the 1958 Agreement are reproduced. It now refers to document ECE/TRANS/WP.29/78/Rev.8 instead of Rev. 7. The former footnote 1 to paragraph 4.4.1. is now footnote 2.
Q2Why it changed
- Proposed by
- Expert from Germany on behalf of the GRSP Task Force on Automated Vehicles Regulation Screening (TF-AVRS)
- Working party
- GRSP, 78th session (December 2025)
Reasons
The Regulation was first written for vehicles with a driver and manual driving controls. The amendment intends to keep the Regulation's spirit and to extend it to vehicles without a driver and without manual driving controls inside the vehicle. The proposal was prepared to enable the application of the Regulation to vehicles equipped with an Automated Driving System (ADS).
Sources (4)
“The Regulation was originally drafted for vehicles with driver and manual driving controls”
“It is the intention of this amendment to keep the spirit of the regulation and to extend its application to vehicles without driver and without manual driving controls inside the vehicle”
“to enable the application of the regulation to vehicles equipped with an Automated Driving System (ADS)”
“See paragraph 0. in the proposal”
WP.29 aimed to adopt all documents of the review of existing UN Regulations for Automated Driving Systems (ADS) at its June 2026 session.
Source
“WP.29 reaffirmed its objective to adopt all documents related to the review of existing UN Regulations related to Automated Driving Systems (ADS) at its June 2026 session”
Document trail
- 2025-09ProposalECE/TRANS/WP.29/GRSP/2025/24Proposal by the expert from Germany on behalf of TF-AVRS
- —Amended in sessionGRSP-78-27TF-AVRS changes to ECE/TRANS/WP.29/GRSP/2025/24
- —Working party adoptsECE/TRANS/WP.29/GRSP/78GRSP session report, para. 43 and Annex XX
- 2026-04Sent to WP.29ECE/TRANS/WP.29/2026/69Text that GRSP sent to WP.29 and AC.1
- —Amended in sessionWP.29-199-10Amendments for the AC.1 vote, reproduced in Annex VI of ECE/TRANS/WP.29/1192
- 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
- Check in R.E.3 (ECE/TRANS/WP.29/78/Rev.8) if your vehicles are of category X or category Y.
- For category X vehicles, find front passenger seats with the "R" point of the most forward passenger seat (paragraph 2.5.).
- Check which ISOFIX fixtures of UN Regulations Nos. 16 or 173 can be installed on each ISOFIX position.
Component supplier
- No direct action for this role.
Technical service / Approval authority
- Do not apply this Regulation to vehicles of category Y (paragraph 1.2.).
- For category X vehicles, check front passenger seats against the "R" point of the most forward passenger seat (paragraph 2.5.).
- Without a driver or manual driving controls in the vehicle, ignore related provisions this amendment does not cover (paragraph 0.1.2.).
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ⓘ This report gives advice only. It is not legal or type-approval advice.