European project - example of signage

Thank you anyway Tristan! Maybe some other Swede could give some input :-).

I found the answer. There is a Swedish ACP in placen which makes signs for "miljöbil" acceptable:

Europe

Signage for Green Vehicles

Qualifying green vehicles in Europe may include, but are not limited to, those meeting the Euro 6 limit values of Regulation (EC) No. 715/2007 on type approval of motor vehicles with respect to emissions from light passenger and commercial vehicles (Euro 5 and Euro 6) and on access to vehicle repair and maintenance information. Euro 6 applies to both diesel and petrol vehicles and is mandatory for all new vehicles sold in the EU. It requires vehicle manufacturers to meet advanced tailpipe emissions and fuel economy targets that are considered equivalent to the average green vehicle in the U.S.
When providing resources to building users regarding designated preferred parking, note that all new vehicles first registered in Europe after September 1, 2015 are required to comply with the Euro 6 vehicle standard.
Several manufacturers have voluntarily incorporated Euro 6 limit values prior to this date, however enforcement of Euro 6 vehicle standard will not retroactively apply to vehicles on the road but sold prior to this date. Manufacturer websites may include information on compliant vehicles prior to enforcement.

Projects in Sweden may also use Miljöbil as an alternative definition of green vehicles. Miljöbil is a national clean vehicle definition established by the Sweden’s Road Traffic Tax Act and Income Tax Act that includes both alternative fuel vehicles and conventionally fueled vehicles. Swedish consumers who purchase a Miljöbil receive tax benefits, free tolls, and free or preferred parking in many places. A database of compliant vehicles may be searched by consumers at miljöfordon.se along with resources to find nearby charging stations and to calculate fuel costs and emissions for a given vehicle.

Note that preferred parking signage guidelines for Milöbil are included in Sweden’s Road Sign Act 2007:90. During building operation, parking managers may verify miljöbilar (green vehicles) by referencing the vehicle registration number in the Transportation Database.