UN Regulation No. 129: Enhanced Child Restraint Systems

Regulation on uniform provisions concerning the approval of enhanced Child Restraint Systems used onboard of motor vehicles.

Related groups: CRS and GRSP
Revision 2 (not yet published)
2018-05-04 11:02:55 UTC
UN R129 (2013)
7 Aug 2013 2010-12-28 08:13:14 UTC 00 series of amendments
UN R129 | Amendment 1 (2014)
10 Feb 2014 2014-02-13 07:24:50 UTC 1 00 series of amendments | Supplement 1 Based upon the adopted proposal: WP.29/2016/106

Proposal to amend the toxicity and flammability provisions.

UN R129 | Amendment 10 (2020)
29 Jan 2020 2020-02-18 14:28:39 UTC 10 00 series of amendments | Supplement 9 Based upon the adopted proposal: WP.29/2019/37

Proposal to

  1. introduce new and modified labeling and to clarify packaging information to distinguish between forward-facing-only, rear-facing-only, and convertible CRS in order to reduce the risk of users misusing these enhanced CRS, and
  2. clarify that assessment of the DE plane only applies to rearward-facing Child Restraint Systems (CRS) in UN Regulation No. 44 and therefore does not apply to forward-facing child restraints that maintain structure of the child restraint behind the head of the dummy.

UN R129 | Amendment 2 (2014)
24 Jun 2014 2014-09-24 16:18:43 UTC 2 00 series of amendments | Supplement 2 Based upon the adopted proposal: WP.29/2013/110

Proposal as approved by the GRSP to amend the regulation pursuant to the recommendations resulting from a review of the text by the informal working group on child restraint systems.

UN R129 | Amendment 3 (2014)
17 Oct 2014 2014-10-21 15:06:04 UTC 3 00 series of amendments | Supplement 3 Based upon the adopted proposal: WP.29/2014/33

This supplement concerns child restraint systems comprised of a base fixture to which a portable shell can be attached. The base fixture is attached to the vehicle by the ISOFIX anchorages in the seating position and the shell attached to the base. However, since the shells may also be designed for use without the base fixture in a configuration where the shell is secured by the adult safety belt of the seating position, this supplement would enable type approvals under UN R129 for this configuration.

UN R129 | Amendment 4 (2015)
9 Nov 2015 2015-11-20 17:06:29 UTC 4 00 series of amendments | Supplement 4 Based upon the adopted proposal: WP.29/2015/43

Proposal as approved by the GRSP to prohibit the use of Y-shaped belt on forward-facing child restraint systems. This proposal aligns UN R129 with provisions already in UN R44.

UN R129 | Amendment 5 (2017)
22 Feb 2017 2017-05-31 16:49:10 UTC 5 01 series of amendments Based upon the adopted proposal: WP.29/2016/38

Proposal to define provisions for “Integral” and “Non-Integral” Enhanced Child Restraint Systems (ECRS). “Integral” refers to systems where the child is restrained only by components which comprise the ECRS (e.g. strap harness, impact shield, etc.), and not by means connected directly to the vehicle (e.g. adult seat belt). “Non-Integral”, then, refers to systems where the child is retained by use of the adult seat belt connected directly to the vehicle. This proposal represents “Phase 1” in the development of UN R129.

UN R129 | Amendment 6 (2017)
26 Jul 2017 2017-09-08 12:05:20 UTC 6 00 series of amendments | Supplement 5 Based upon the adopted proposal: WP.29/2016/105

Proposal to

  1. amend the toxicity and flammability declarations via references to EN71 (European safety standards)
  2. align paragraph 6.6.3.1. with the 01 series of amendments,
  3. to align requirements in 7.1.3.1 to test methods in 8.1.2.4.,
  4. add tolerances to better define the test method in paragraph 8.1.2.3.,
  5. improve the specifications for the measurement of dimensions C and D in Annex 23,
  6. align deceleration test requirements with acceleration test provisions (making explicit that it is mandatory to match the corridor for each test, and
  7. define the initial acceleration value under paragraph 7.3. against which the maximum deviation restriction is to be applied.

UN R129 | Amendment 7 (2018)
10 Aug 2018 2018-08-17 09:30:40 UTC 7 00 series of amendments | Supplement 6 Based upon the adopted proposal: WP.29/2017/124

In order to facilitate the establishment of an International Whole Vehicle Type Approval, provisions concerning requirements for child restraint systems are being extracted from UN R14 into a new regulation. Therefore, this proposal would update the references to UN R14 in UN R129 to enable recognition of anchorage approvals under the adult safety belt regulation (UN R14 as amended) and the new child restraint anchorage regulation.

UN R129 | Amendment 8 (2019)
16 Jan 2019 2019-01-25 09:52:14 UTC 8 00 series of amendments | Supplement 7 Based upon the adopted proposal: WP.29/2018/40

Proposal to delete the requirement for chest deflection and abdominal pressure data under the dynamic tests. These criteria were not required in this (original or 00 series) version of UN R129.

UN R129 | Amendment 9 (2019)
24 Jun 2019 2020-02-18 14:27:13 UTC 9 00 series of amendments | Supplement 8 Based upon the adopted proposal: WP.29/2018/136

Proposal to align end-user information provisions with those adopted for UN R44.

UN R129 | Revision 1 (2018)
18 May 2018 2018-05-28 08:02:12 UTC 1 01 series of amendments Based upon the adopted proposal: WP.29/2016/38

Proposal to define provisions for “Integral” and “Non-Integral” Enhanced Child Restraint Systems (ECRS). “Integral” refers to systems where the child is restrained only by components which comprise the ECRS (e.g. strap harness, impact shield, etc.), and not by means connected directly to the vehicle (e.g. adult seat belt). “Non-Integral”, then, refers to systems where the child is retained by use of the adult seat belt connected directly to the vehicle. This proposal represents “Phase 1” in the development of UN R129.

UN R129 | Revision 1 | Amendment 1 (2017)
26 Jul 2017 2017-09-08 13:02:28 UTC 1 1 01 series of amendments | Supplement 1 Based upon the adopted proposal: WP.29/2016/106

Proposal to amend the toxicity and flammability provisions.

UN R129 | Revision 1 | Amendment 2 (2017)
26 Jul 2017 2017-09-08 13:05:04 UTC 1 2 02 series of amendments Based upon the adopted proposal: WP.29/2016/107

Proposal to introduce CRS Informal Group “phase 2” amendments regarding the approval of booster-seat CRS category (booster seat with backrest) into UN R129.

UN R129 | Revision 1 | Amendment 3 (2018)
27 Apr 2018 2018-05-04 10:57:44 UTC 1 3 01 series of amendments | Supplement 2 Based upon the adopted proposal: WP.29/2017/62

Proposal to update the module label, clarify the text, and make editorial corrections to the 01 series of amendments.

UN R129 | Revision 1 | Amendment 4 (2018)
10 Aug 2018 2018-08-17 09:33:34 UTC 1 4 01 series of amendments | Supplement 3 Based upon the adopted proposal: WP.29/2017/125

Proposal to amend UN R129 in line with the proposal to amend UN R14 (document GRSP/2017/8) in order to separate child restraint provisions (including ISOFIX anchorage provisions) into a new UN Regulation. The ISOFIX amendment to UN R14 has been introduced to facilitate the establishment of the International Whole Vehicle Type Approval (IWVTA) regulation by limiting the scope of UN R14 to adult safety belts.

The proposal also incorporates amendments developed by the CRS informal working group to enable the type approval of integral and non-integral Enhanced Child Restraint Systems equipped with an impact shield.

Lastly, the proposal would introduce a provision prohibiting the use of the Unique Identifier allowed under the Revision 3 of the 1958 Agreement as an alternative to the current approval mark. In the case of child restraint systems, the approval mark contains important information for users.

UN R129 | Revision 1 | Amendment 5 (2019)
16 Jan 2019 2019-01-25 09:54:37 UTC 1 5 01 series of amendments | Supplement 4 Based upon the adopted proposal: WP.29/2018/41

Proposal to clarify that the opening force applied to the ISOFIX attachments of a complete seat or of a seat component under the test protocol is 50 ± 1 N.

UN R129 | Revision 1 | Amendment 6 (2019)
24 Jun 2019 2020-02-18 14:30:57 UTC 1 6 01 series of amendments | Supplement 5 Based upon the adopted proposal: WP.29/2018/137

Proposal to

  1. require that the shoulder strap positioner, if any, and the buckle open independently of each other in order to satisfy the requirement that the buckle can be opened by a single action;
  2. align end-user information provisions with that adopted for UN R44;
  3. reinsert text omitted during the transcription of the adopted texts of Supplement 3 to the 01 series of amendments and Supplement 2 to the 02 series of amendments; and
  4. harmonize airbag warning labels regarding the correct use of a child restraint system in a seating position equipped with an activated frontal airbag in order to prohibit the display of additional information unrelated to child safety.

UN R129 | Revision 1 | Amendment 7 (2020)
29 Jan 2020 2020-02-18 14:32:29 UTC 1 7 01 series of amendments | Supplement 6 Based upon the adopted proposal: WP.29/2019/38

Proposal to

  1. introduce new and modified labeling and to clarify packaging information to distinguish between forward-facing-only, rear-facing-only, and convertible CRS in order to reduce the risk of users misusing these enhanced CRS, and
  2. clarify that assessment of the DE plane only applies to rearward-facing Child Restraint Systems (CRS) in UN Regulation No. 44 and therefore does not apply to forward-facing child restraints that maintain structure of the child restraint behind the head of the dummy.

UN R129 | Revision 2 (2018)
19 Oct 2018 2019-01-25 09:57:25 UTC 2 02 series of amendments Based upon the adopted proposal: WP.29/2016/107

Proposal to introduce CRS Informal Group “phase 2” amendments regarding the approval of booster-seat CRS category (booster seat with backrest) into UN R129.

01 series of amendments | Supplement 1 Based upon the adopted proposal: WP.29/2016/106

Proposal to amend the toxicity and flammability provisions.

UN R129 | Revision 2 | Amendment 1 (2018)
27 Apr 2018 2018-05-04 11:01:44 UTC 2 1 02 series of amendments | Supplement 1 Based upon the adopted proposal: WP.29/2017/63

Proposal to align the provisions on toxicity and flammability of materials used to manufacture Child Restraint Systems (CRS) and to update test provisions of UN Regulation introduced by the Supplement 1 to the 01 series of amendments to UN Regulation No. 129. The proposal also clarifies requirements and improves the text of the 02 series of amendments, including strap positioning provisions and labeling requirements for detachable child seat impact shields.

UN R129 | Revision 2 | Amendment 2 (2018)
10 Aug 2018 2018-08-17 09:22:19 UTC 2 2 02 series of amendments | Supplement 2 Based upon the adopted proposal: WP.29/2017/126

Proposal to amend UN R129 in line with the proposal to amend UN R14 (document GRSP/2017/8) in order to separate child restraint provisions (including ISOFIX anchorage provisions) into a new UN Regulation. The ISOFIX amendment to UN R14 has been introduced to facilitate the establishment of the International Whole Vehicle Type Approval (IWVTA) regulation by limiting the scope of UN R14 to adult safety belts.

The proposal also incorporates amendments developed by the CRS informal group to enable the type approval of integral and non-integral Enhanced Child Restraint Systems equipped with an impact shield.

Lastly, the proposal introduces a provision to prohibit use of the Unique Identifier allowed under Revision 3 of the 1958 Agreement as an alternative to the current approval mark. In the case of child restraint systems, the approval mark contains important information for users.

UN R129 | Revision 3 (2018)
19 Oct 2018 2019-01-25 10:15:46 UTC 3 02 series of amendments | Supplement 1 Based upon the adopted proposal: WP.29/2017/63

Proposal to align the provisions on toxicity and flammability of materials used to manufacture Child Restraint Systems (CRS) and to update test provisions of UN Regulation introduced by the Supplement 1 to the 01 series of amendments to UN Regulation No. 129. The proposal also clarifies requirements and improves the text of the 02 series of amendments, including strap positioning provisions and labeling requirements for detachable child seat impact shields.

02 series of amendments | Supplement 2 Based upon the adopted proposal: WP.29/2017/126

Proposal to amend UN R129 in line with the proposal to amend UN R14 (document GRSP/2017/8) in order to separate child restraint provisions (including ISOFIX anchorage provisions) into a new UN Regulation. The ISOFIX amendment to UN R14 has been introduced to facilitate the establishment of the International Whole Vehicle Type Approval (IWVTA) regulation by limiting the scope of UN R14 to adult safety belts.

The proposal also incorporates amendments developed by the CRS informal group to enable the type approval of integral and non-integral Enhanced Child Restraint Systems equipped with an impact shield.

Lastly, the proposal introduces a provision to prohibit use of the Unique Identifier allowed under Revision 3 of the 1958 Agreement as an alternative to the current approval mark. In the case of child restraint systems, the approval mark contains important information for users.

UN R129 | Revision 3 | Amendment 1 (2019)
16 Jan 2019 2019-01-25 10:17:37 UTC 3 1 02 series of amendments | Supplement 3 Based upon the adopted proposal: WP.29/2018/42

Proposal to specify the proper use and behavior of an adult safety-belt used to install a non-integral Enhanced CRS during dynamic tests. These instructions are present in UN R44, but not in UN R129. Therefore, this proposal would align the two regulations. The proposal also clarifies that the opening force applied to the ISOFIX attachments of a complete seat or of a seat component under the test protocol is 50 ± 1 N.

UN R129 | Revision 3 | Amendment 2 (2019)
16 Jan 2019 2019-01-25 10:19:20 UTC 3 2 03 series of amendments Based upon the adopted proposal: WP.29/2018/45

Proposal to introduce provisions for the approval of universal belted and specific-to-vehicle belted child restraint systems. The proposal also introduces provisions for lower tether straps. This proposal represents the culmination of the “Phase 3” amendments prepared by the CRS informal group. This amendment concludes the three-phased program to develop a new UN Regulation for CRS to supersede UN R44.

UN R129 | Revision 3 | Amendment 3 (2019)
24 Jun 2019 2020-02-18 14:38:36 UTC 3 3 02 series of amendments | Supplement 4 Based upon the adopted proposal: WP.29/2018/138

Proposal to

  1. require that the shoulder strap positioner, if any, and the buckle open independently of each other in order to satisfy the requirement that the buckle can be opened by a single action;
  2. align end-user information provisions with that adopted for UN R44;
  3. reinsert text omitted during the transcription of the adopted texts of Supplement 3 to the 01 series of amendments and Supplement 2 to the 02 series of amendments; and
  4. harmonize airbag warning labels regarding the correct use of a child restraint system in a seating position equipped with an activated frontal airbag in order to prohibit the display of additional information unrelated to child safety.

UN R129 | Revision 3 | Amendment 4 (2020)
29 Jan 2020 2020-02-18 14:39:57 UTC 3 4 02 series of amendments | Supplement 5 Based upon the adopted proposal: WP.29/2019/39

Proposal to

  1. introduce new and modified labeling and to clarify packaging information to distinguish between forward-facing-only, rear-facing-only, and convertible CRS in order to reduce the risk of users misusing these enhanced CRS
  2. clarify that assessment of the DE plane only applies to rearward-facing Child Restraint Systems (CRS) in UN Regulation No. 44 and therefore does not apply to forward-facing child restraints that maintain structure of the child restraint behind the head of the dummy
  3. specify the dimensions of the approval number
  4. correct the term “Regulation No. 129-02” to “UN Regulation No. 129/02”
  5. change the 145 cm stature of the Specific Vehicle Booster seat to the 150 cm stature as this is the upper limit, and
  6. modify the approval markings for consistency between technical services and approval authorities and between the labels of products approved under the 02 and 03 series.

UN R129 | Revision 4 | Amendment 1 (2019)
24 Jun 2019 2020-02-18 14:42:27 UTC 4 1 03 series of amendments | Supplement 1 Based upon the adopted proposal: WP.29/2018/139

Proposal to

  1. require that the shoulder strap positioner, if any, and the buckle open independently of each other in order to satisfy the requirement that the buckle can be opened by a single action;
  2. align end-user information provisions with that adopted for UN R44;
  3. reinsert text omitted during the transcription of the adopted texts of Supplement 3 to the 01 series of amendments and Supplement 2 to the 02 series of amendments; and
  4. harmonize airbag warning labels regarding the correct use of a child restraint system in a seating position equipped with an activated frontal airbag in order to prohibit the display of additional information unrelated to child safety.

UN R129 | Revision 4 | Amendment 2 (2020)
29 Jan 2020 2020-02-18 14:43:51 UTC 4 2 03 series of amendments | Supplement 2 Based upon the adopted proposal: WP.29/2019/40

Proposal to

  1. introduce new and modified labeling and to clarify packaging information to distinguish between forward-facing-only, rear-facing-only, and convertible CRS in order to reduce the risk of users misusing these enhanced CRS
  2. clarify that assessment of the DE plane only applies to rearward-facing Child Restraint Systems (CRS) in UN Regulation No. 44 and therefore does not apply to forward-facing child restraints that maintain structure of the child restraint behind the head of the dummy
  3. specify the dimensions of the approval number
  4. update i-Size universal ISOFIX, Specific Vehicle ISOFIX, i-Size Booster seat and Specific Vehicle Booster seat numbering (omitted in WP29-2018-045)
  5. rearrange the dimensions mark for arrangements of the approval mark where used in combination with the module mark
  6. change the 145 cm stature of the Specific Vehicle Booster seat to 150 cm stature as this is the correct upper limit, and
  7. clarify that Conformity of Production assessments shall be conducted under the same requirements as those of the original approval or, if applicable, the extension of the approval.

UN R129: Corrigendum 1 (2013)
27 Aug 2013 2013-09-13 21:21:12 UTC 00 series of amendments | Corrigendum 1
Earlier texts may be available through the UN Official Document System.