10. The expert from the United States of America informed GRSP that the NPRM activity above-mentioned in para. 7 was in progress and would incorporate a discussion of the new proposed requirements for the head form tests (ECE/TRANS/WP.29/GRSP/2014/2 and ECE/TRANS/WP.29/GRSP/2014/5). He recommended that interested parties comment on the proposed amendments to the head form tests in the NPRM so that a globally harmonized procedure could be developed. GRSP confirmed that the proposal of amendments would concern Phases 1 and 2 of the UN GTR.