8. The expert from the United States introduced GRSP-52-27 aimed at explaining his study reservation to the proposed amendment to the UN GTR (ECE/TRANS/WP.29/AC.3/31 and ECE/TRANS/WP.29/GRSP/2012/14). He explained that the National Highway Traffic Safety Administration (NHTSA) was currently conducting tests to evaluate differences between target/aim point and first point of contact with respect to testable area and Head Injury Criteria (HIC) outcome. He concluded that, until this testing was completed, he was not in the position to give a final decision on the proposal. GRSP agreed to resume consideration on this subject at its May 2013 session.

9. As the United States was not represented by an expert, the Chair announced that she was not in a position to present a proposal to solve the study reservation raised by her country at the prior session to the proposed amendment to the UN GTR (ECE/TRANS/WP.29/AC.3/31 and ECE/TRANS/WP.29/GRSP/2012/14). GRSP agreed to resume consideration of this subject at its December 2013 session. It was also agreed to seek guidance to the June 2013 session of the Administrative Committee for the Coordination of Work (WP.29/AC.2) about the possible simultaneous adoption of the two proposed amendments to the UN GTR (Phase 2 and Amendment 2); OICA noted that Amendment 2 needs to apply to both Phase 1 and Phase 2 of the UN GTR.

9. As the United States was not represented by an expert, the Chair announced that she was not in a position to present a proposal to solve the study reservation raised by her country at the prior session to the proposed amendment to the UN GTR (ECE/TRANS/WP.29/AC.3/31 and ECE/TRANS/WP.29/GRSP/2012/14). GRSP agreed to resume consideration of this subject at its December 2013 session. It was also agreed to seek guidance to the June 2013 session of the Administrative Committee for the Coordination of Work (WP.29/AC.2) about the possible simultaneous adoption of the two proposed amendments to the UN GTR (Phase 2 and Amendment 2); OICA noted that Amendment 2 needs to apply to both Phase 1 and Phase 2 of the UN GTR.

9. The expert from the EC introduced GRSP-54-07-Rev.1 to clarify provisions of the headform tests and superseding ECE/TRANS/WP.29/GRSP/2012/14 (including the final report ECE/TRANS/WP.29/GRSP/2012/2). The expert from the United States of America stated that, as a general issue, the proposal was not evidence-based (GRSP-54-31) and lacked data from the current method. GRSP agreed to resume discussion at its May 2014 session on the basis of more data and requested the secretariat to distribute GRSP-54-07-Rev.1 with an official symbol and to keep GRSP-54-31 as a reference.