26. The expert from Germany introduced ECE/TRANS/WP.29/GRSP/2017/40 aimed at defining the conditions of door opening after test collision. The expert from OICA expressed concerns on the interpretation of results and underlined the need of a reasonable and repeatable test procedure. The expert from Italy endorsed in principle the proposal. However, he requested more depth to avoid misinterpretations. The expert from Germany clarified that the test procedure was already described in the test protocol of Euro NCAP. However, he suggested that the matter be dealt with in cooperation with the expert from OICA to devise a repeatable test. GRSP agreed to resume discussion at its May 2018 session on the basis of a revised proposal.