Proposal to

1. enable the use of autonomous CNG heaters for the heating of engines before the vehicle is in service
2. allow the use of Class 0 hoses with couplings using sealing technologies other than those with a 45° cone
3. correct a typographical error in paragraph 7.1. where the reference should be to paragraph 8.22 rather than 8.21
4. remove a duplicate and contradictory reference in Annex 4A to the requirements of Class 1 pressure relief valves
5. align paragraph 2.2. of Annex 4H with paragraph 18.6.1.2. limiting the delay in switching-off of the automatic valve after stalling of the engine to two seconds (rather than five as presently in the text), and
6. include the liquefied natural gas (LNG) fuel connector provisions as specified in ISO 12617:2015.