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.