4. GRSP considered the issue of UN GTR No. 9 Amendment 3 (Headform test) but concluded that since there was no new information made available to the experts, it was not possible to restart the discussions on Amendment 3. GRSP recalled the recommendation in the report of WP.29 (see ECE/TRANS/WP.29/1157, paragraphs 148 to 150) that in the interim, GRSP conclude its discussions on Amendment 4 on the Deployable Pedestrian Protection Systems (DPPS), which then be re-numbered as the new Amendment 3. The experts had agreed that when new information becomes available, experts from Germany, Netherlands, United States, other contracting parties and interested stakeholders would seek to reengage the discussion on the headform test as the new Amendment 4.