13. GRSP noted that NHTSA was currently preparing a Notice of Proposed Rule Making (NPRM) on Phase 1 of the UN GTR. The Chair of GRSP informed the Group that NHTSA had started a series of hydraulic and pneumatic cycling tests of containers to evaluate the test procedures and to develop the necessary details for self-certification compliance. The NPRM should be published by the end of 2016. He also added that consultations were in progress with former and possible new co-sponsors to define the issues for development in Phase 2, for example: (i) harmonization of crash tests, (ii) material compatibility of tanks and fuel systems and (iii) tank stress rupture and electric safety provisions (transposed from the UN GTR on Electric Vehicle Safety). He also added that the improvement of Phase 1 provisions would be discussed and incorporated. Once, the co-sponsors and leaders for Phase 2 have been identified, WP.29 would be requested to add Phase 2 into the Programme of Work and to form an IWG. The first IWG meeting, in late 2016, would begin drafting the Terms of Reference (ToR) and begin developing the scope of Phase 2. Finally, the experts from Japan, the Republic of Korea and EU stated their intention to co-sponsor and participate in the development of Phase 2 of the UN GTR.