WP.29 193rd session: amendments to UN Regulations
25–28 June 2024
Amendments to UN Regulations that the WP.29 documents submitted for the vote at the 193rd session. Each change report shows what changes, why, and who is affected.
This list has the 32 amendments with a RegVault change report, in 23 regulations. It is not the full agenda of the session.
UN R13 — Heavy vehicle braking
- 13 series — Supplement 2
New paragraphs 5.3. to 5.3.3. set provisions for the braking system of vehicles with an Automated Driving System (ADS), other than Automated Lane Keeping Systems.
- 12 series — Supplement 4
New paragraphs 5.3. to 5.3.3. set provisions for the braking system of vehicles with an Automated Driving System (ADS), other than Automated Lane Keeping Systems.
- 11 series — Supplement 22
New paragraphs 5.3. to 5.3.3. set provisions for the braking system of vehicles with an Automated Driving System (ADS), other than Automated Lane Keeping Systems.
UN R13H — Braking of passenger cars
- 01 series — Supplement 5
New paragraphs 5.3. to 5.3.3. set provisions for the braking equipment of vehicles with an Automated Driving System (ADS), other than Automated Lane Keeping Systems.
UN R22 — Protective helmets and visors
- 06 series — Supplement 3
Annex 20 now defines a rigid speaker simulator in two sizes: 40 mm and 45 mm in diameter.
UN R30 — Tyres for passenger cars and their trailers
- 02 series — Supplement 26
The scope (paragraph 1.) has a new footnote. It says that the Regulation defines requirements for tyres as a component and does not limit their installation on any categories of vehicles.
UN R41 — Noise emissions of motorcycles
- 05 series — Supplement 3
In Annex 3, the road surface covering of the test site must conform to ISO10844:2021 instead of ISO10844:2014.
- 04 series — Supplement 11
In Annex 3, the road surface covering of the test site must conform to ISO10844:2021 instead of ISO10844:2014.
UN R49 — Emissions of C.I. and P.I. (LPG and CNG) engines
- 06 series — Supplement 9
New paragraphs 3.5., 4.12.3.3.8. and 5.1.6. set provisions for engines fuelled with hydrogen, including the approval mark letters T, TD, U and UD.
- 05 series — Supplement 12
New paragraphs 3.5., 4.6.3.3. and 5.1.10. set provisions for engines fuelled with hydrogen, including approval mark letters T, TD, U and UD.
UN R51 — Noise of M and N categories of vehicles
- 03 series — Supplement 10
Serial hybrid vehicles whose combustion engine has no mechanical coupling to the power train are excluded from paragraph 6.2.3. until 30 June 2028. Before, the date was 30 June 2025.
UN R54 — Tyres for commercial vehicles and their trailers
- 00 series — Supplement 27
For tyres identified by the "tyre to rim fitment configuration" symbol "A", new paragraph 6.1.4.2.1. sets the maximum overall width in the lower area. It equals the nominal width of the mounting rim, as shown by the manufacturer in the descriptive note, increased by 38 mm. Before, paragraph 6.1.4.3. gave the overall width in the lower area as the rim width increased by 27 mm.
UN R63 — Noise emissions of mopeds
- 02 series — Supplement 6
Annex 3 now refers to ISO 10844:2021 for the test track surface, in place of ISO 10844:2014.
UN R78 — Braking (category L vehicles)
- 06 series — Supplement 1
Paragraph 9.14. is now an exception to paragraph 9.12., not to paragraph 9.10.
UN R79 — Steering equipment
- 04 series — Supplement 6
Paragraph 5.8. has steering equipment requirements for vehicles with an ADS, other than Automated Lane Keeping Systems as defined in UN Regulation No. 157.
- 03 series — Supplement 11
New paragraphs 5.8. to 5.8.3.1. set requirements for the steering equipment of vehicles equipped with an Automated Driving System (ADS). Automated Lane Keeping Systems as defined in UN Regulation No. 157 are excluded.
UN R83 — Emissions of M1 and N1 vehicles
- 08 series — Supplement 1
Paragraphs 12.2.1. to 12.2.3. now refer to requirements for character EA, EB or EC in Table A3/1, without a list of items (a) to (e).
- 07 series — Supplement 17
Paragraphs 7.2.2., 7.2.4. and 7.3.2. of Annex 7 now give pressure values in kPa instead of mm of H2O. Under paragraph 7.3.5., the pressure of the fuel system must now drop to less than 2.5 kPa above ambient pressure within one minute.
- 06 series — Supplement 20
In Annex 7, paragraphs 7.2.2. and 7.3.2. now give the pressure in kPa: 3.70 kPa ± 0.10 kPa instead of 370 ±10 mm of H2O.
UN R85 — Measurement of the net power and the 30 min. power
- 00 series — Supplement 13
New text in Annex 6, Table 1 says: “In the case that the liquid-cooling pumps are electrically driven, an external circuit including pump, radiator and thermostat in relative positions which differ from those in the vehicle can be used provided that the pressure loss of this circuit and/or the volume flow of the pump remain substantially the same as those of the drive train cooling system of the intended application”.
UN R96 — Emissions from Non-Road Mobile Machinery (NRMM) engines
- 05 series — Supplement 1
New paragraph 3.1.1., Appendix 4, paragraphs A.4.4. to A.4.4.3. and Annex 11 add requirements for the type approval of engines operated solely on hydrogen.
UN R100 — Electric power trained vehicles
- 04 series — Base text
New paragraph 5.5.1. requires labels, as specified in Annex 10, on M2/N2 and M3/N3 vehicles equipped with a high voltage electric powertrain. This requirement is considered satisfied if the requirement of paragraph 7.1.7. of UN Regulation No. 134 is satisfied (para. 5.5.1.1.).
UN R101 — CO2 emission/fuel consumption
- 01 series — Supplement 13
Paragraph 9.4.3.1. now says that the vehicle must be prepared according to the procedure in paragraph 5.2.2. of Annex 7.
UN R108 — Retreaded tyres for passenger cars and their trailers
- 01 series — Base text
Snow test requirements and Annex 9 (snow test procedures) are deleted; paragraph 2.55. now refers to paragraph 6.1. of UN Regulation No. [XXX]. For the approval, the documents of paragraphs 6.6.3.1. and 6.6.3.3. now include a copy of the UN Regulation No. [XXX] certificate(s).
UN R109 — Retreaded tyres for commercial vehicles and their trailers
- 01 series — Base text
Snow test and traction tyre classification requirements are deleted, and paragraph 2.53. now refers to paragraph 6.1. of UN Regulation No. [XXX].
UN R117 — Tyres rolling resistance, rolling noise and wet grip
- 04 series — Supplement 2
The Regulation now also applies to C1 tyres in new state with regard to their tyre abrasion, as defined in paragraph 1.3. Starting from 1 January 2027, the manufacturer must communicate the abrasion level during the approval of new types of class C1 tyres.
- 03 series — Supplement 2
Paragraph 2.18. adds the reference tyres “SRTT19.5 siped” and “SRTT22.5 siped”. The wet grip index of class C2 and C3 tyres and the snow grip index in paragraph 4.8.4. now include a factor f.
UN R120 — Net power of tractors and non-road mobile machinery
- 02 series — Supplement 1
Hydrogen is now item (g) in the reference fuel list of paragraph 5.2.3., and new paragraph 3.3. of Annex 7 gives a table for hydrogen.
UN R129 — Enhanced Child Restraint Systems (ECRS)
- 04 series — Supplement 1
Paragraph 6.1.3.4. now says that Enhanced Child Restraint Systems of the booster seat and booster cushion categories must have only one adult safety-belt route.
- 03 series — Supplement 11
Paragraph 6.1.3.4. now says that Enhanced Child Restraint Systems of the booster seat and booster cushion categories must have only one adult safety-belt route.
UN R138 — Quiet road transport vehicles (QRTV)
- 02 series — Base text
The specifications now apply “in forward and reverse driving condition” for the mandatory speed range of greater than 0 km/h up to and inclusive 20 km/h.
UN R155 — Cyber security and cyber security management system
- 00 series — Supplement 3
The Regulation now applies to vehicles of Categories L, M, N and O, if fitted with at least one electronic control unit.