1.Alcohol interlock installation facilitation shall allow the fitting or retrofitting of an alcohol interlock complying with European Standards EN 50436-1:2014 or EN 50436-2:2014.2. The vehicle system as regards alcohol interlock installation facilitation in each motor vehicle of Categories M and N shall conform to the relevant vehicle model as laid down in the alcohol interlock installation document ('installation document'), conforming to European Standard EN 50436-7:2016. For this purpose, the installation document shall cover at least one of the options in EN 50436-7:2016 Annex C 3a, 3b or 3c. The vehicle manufacturer may provide the installation document conforming to later revisions of the European Standard, in agreement with the approval authority and the technical service.