Proposal to modify door latch and door retention component requirements to include door closure warning systems and additional locking provisions, add power loss provisions for latch release controls and door handles, insert definition of retractable door handle, and incorporate test procedures for sliding side doors, with transition period allowing approvals under preceding series until 1 September 2016, after which Contracting Parties shall grant approvals only in accordance with amended requirements, based on WP.29/2014/71.