UN R66 Supplement 1 (02 series) · UNECE Regulation No. 66 (ECE R66) — Uniform provisions concerning the approval of large passenger vehicles with regard to the strength of their superstructure.
UN R66 — Supplement 1 to the 02 series of amendments
Base text → Supplement 1
- What changed
- New paragraphs 0. to 0.1.2. add an Introduction on vehicles of category X and on conventional vehicles equipped with an ADS.
- For vehicles of category X, the unladen kerb mass (Mk) in paragraph 2.15. does not include the driver’s mass.
- In a vehicle without “driver/driver’s compartment/manual driving controls”, provisions related to them must not be taken into account, unless this amendment already covers them.
- Why
- The Regulation was originally drafted for vehicles with a driver’s compartment and manual driving controls.
- The amendment intends to extend the application of the Regulation to vehicles without a driver, without a driver’s compartment and without manual driving controls.
- The proposal follows the common recommendations of the TF-AVRS activities, coordinated with the subsidiary bodies of WP.29.
Q1What changed6 changes
New Introduction: the purpose of Supplement 1 (paras 0. and 0.1.)
New paragraph 0. adds an Introduction to the Regulation. Paragraph 0.1. says that Supplement 1 is introduced to take into account vehicles of category X. It is also introduced to take into account conventional vehicles equipped with an Automated Driving System (ADS). Before this supplement, the Regulation had no paragraph 0.
Vehicles without a driver, driver’s compartment or manual driving controls, and vehicles with an ADS (paras 0.1.1. and 0.1.2.)
Paragraph 0.1.1. says that the Regulation was originally drafted for vehicles with a driver’s compartment and manual driving controls. The amendment intends to keep the spirit of the Regulation. It also intends to extend the application of the Regulation to vehicles without a driver, without a driver’s compartment and without manual driving controls. In a vehicle without “driver/driver’s compartment/manual driving controls”, provisions related to them must not be taken into account, unless this amendment already covers them. Paragraph 0.1.2. says that for vehicles equipped with an ADS in any driving mode, no special provisions or exemptions apply.
Unladen kerb mass of vehicles of category X (para. 2.15.)
For vehicles of category X, the unladen kerb mass (Mk) in paragraph 2.15. now does not include the driver’s mass. Before this supplement, the definition had no special rule for vehicles of category X. The rest of the definition does not change.
Reference to R.E.3 in footnote 1 (para. 1.1.)
Footnote 1 to paragraph 1.1. now refers to the Consolidated Resolution on the Construction of Vehicles (R.E.3.), document ECE/TRANS/WP.29/78/Rev.8. Before, it referred to Annex 7 to R.E.3, document TRANS/WP.29/78/Rev.1/Amend.2 as last amended by Amend.4. The footnote now also gives a web address.
Q2Why it changed
- Proposed by
- Expert from the Kingdom of the Netherlands on behalf of the Task Force on Automated Vehicles Regulatory Screening (TF-AVRS)
- Working party
- GRSG, 130th session (October 2025)
Reasons
Supplement 1 is introduced to take into account vehicles of category X. It is also introduced to take into account conventional vehicles equipped with an Automated Driving System (ADS).
Sources (2)
“Supplement 1 to the 02 series of amendments is introduced to take into account vehicles of category X”
“as well as conventional vehicles which are equipped with an Automated Driving System (ADS)”
The Regulation was originally drafted for vehicles with a driver’s compartment and manual driving controls. The amendment intends to keep the spirit of the Regulation. It also intends to extend the application of the Regulation to vehicles without a driver, without a driver’s compartment and without manual driving controls.
Sources (2)
“The Regulation was originally drafted for vehicles with driver’s compartment and manual driving controls.”
“It is the intention of this new amendment to keep the spirit of the Regulation and to extend its application to vehicles without driver, driver’s compartment and without manual driving controls in the vehicle.”
This proposal is one of the TF-AVRS proposals that update UN Regulations. They follow the common recommendations of the TF-AVRS activities, coordinated with the subsidiary bodies of WP.29.
Source
“on behalf of the Task Force on Automated Vehicles Regulatory Screening (TF-AVRS) introduced proposals of amendments updating the regulations (ECE/TRANS/WP.29/GRSG/2025/14 to 46) according to the common recommendations of the coordinated task force activities with the subsidiary bodies of WP.29”
Document trail
- 2025-07ProposalECE/TRANS/WP.29/GRSG/2025/24Proposal by the expert from the Kingdom of the Netherlands on behalf of TF-AVRS
- —RevisedGRSG-130-63Revised TF-AVRS proposal that replaced ECE/TRANS/WP.29/GRSG/2025/24
- —Working party adoptsECE/TRANS/WP.29/GRSG/109Session report, para. 34
- 2026-04Sent to WP.29ECE/TRANS/WP.29/2026/111Text that GRSG 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
- For category X vehicles, leave the driver’s mass out of the unladen kerb mass (Mk) (para. 2.15.). Then check the values that use Mk, for example the total effective vehicle mass (Mt).
- For a vehicle without “driver/driver’s compartment/manual driving controls”, list the provisions related to them. Then find which of them this amendment already covers (para. 0.1.1.).
- For a vehicle with an ADS in any driving mode, do not plan for special provisions or exemptions (para. 0.1.2.).
Component supplier
- Ask the vehicle manufacturer if the vehicle is of category X, because paragraph 2.15. depends on this.
- Ask the vehicle manufacturer if the vehicle has “driver/driver’s compartment/manual driving controls”, because paragraph 0.1.1. depends on this.
Technical service / Approval authority
- For category X vehicles, check that the unladen kerb mass (Mk) does not include the driver’s mass (para. 2.15.).
- For a vehicle without “driver/driver’s compartment/manual driving controls”, leave out the related provisions that this amendment does not already cover (para. 0.1.1.).
- For a vehicle equipped with an ADS in any driving mode, apply no special provisions or exemptions (para. 0.1.2.).
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ⓘ This report gives advice only. It is not legal or type-approval advice.