Explanatory notes related to formal documents GRSP/2018/ 19 through 22 (superseded by informal documents GRSP-64-02 to GRSP-64-05) submitted by Spain for the 63rd GRSP session.

29. The expert from Spain introduced GRSP-64-06, GRSP-64-02-Rev.1, GRSP-64-03-Rev.1, GRSP-64-04-Rev.1 and GRSP-64-05-Rev.1 which aimed at providing better provisions for the dummy’s head displacement when surpassing the reference plane DE during frontal and rear impact tests of forward facing Enhanced Child Restraint Systems (ECRS). She explained that these documents were revised proposals and have already been introduced at the May 2018 session of GRSP (ECE/TRANS/WP.29/GRSP/63, para. 33) to provide better rationales for the sled test. GRSP adopted GRSP-64-02-Rev.1, GRSP-64-03-Rev.1, GRSP-64-04-Rev.1 and GRSP-64-05-Rev.1 as reproduced in Annex V to the session report. The secretariat was requested to submit GRSP-64-02-Rev.1 as draft Supplement 9 to the original version of UN Regulation No. 129, GRSP-64-03-Rev.1 as draft Supplement 6 to the 01 series of amendments, GRSP-64-04-Rev.1 as draft Supplement 5 to the 02 series of amendments and GRSP-64-05-Rev.1 as draft Supplement 2 to the 03 series of amendments to UN Regulation No. 129 for consideration and vote at the June 2019 sessions of WP.29 and AC.1.

Proposal from Spain on behalf of the Technical Services Group (TSG) on UN R129 to allow the head of the dummy to pass the DE plane provided there is a structure (e.g., head pad or backrest) that provides adequate protection for the head. Under UN R129, the combination of a stiffer test bench foam and the design of the test dummy can mean that when testing forward-facing child restraints (including boosters), the dummy’s head often passes the DE plane. The Q-series dummies are not proven to be biofidelic during the rebound phase of the impact test. In such cases, the head pad or backrest provides protection to the child’s head and the energy-absorption properties of this structure will have been tested using the test method described in UN Regulation No. 129.

33. The expert from Spain introduced ECE/TRANS/WP.29/GRSP/2018/19, ECE/TRANS/WP.29/GRSP/2018/20, ECE/TRANS/WP.29/GRSP/2018/21 and ECE/TRANS/WP.29/GRSP/2018/22 aimed at providing better provisions for the dummy’s head displacement when surpassing the reference plane DE during frontal and rear impact tests of forward facing Enhanced Child Restraint Systems. The expert from Germany argued that the current text of the UN Regulation prevented the contact of the head. He added that dummies have performance limits and that in this context these limitations would not affect the test results. The GRSP Chair requested the expert from Spain to provide better rationales for the sled test and to clarify if her proposals also referred to vehicle tests. GRSP agreed to resume discussion on this subject at its December 2018 session.

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.