A number of Provinces and cities have low emission zones for lorries, and Tirol has a 'motorway low emission zones ' and various other schemes in operation on the A12 motorway to reduce the pollution.
There is a national low emission zones framework has differently coloured stickers from 1st January 2015, which is also valid for all vehicles. The stickers can be purchased from garages in Austria and cost 2,50 €, see here for more details. They are also distributed at certain repair garages and some ÖAMTC offices, see here for a list of garages. Stickers are required for Vienna and Niederösterreich, and are likely to be required in other Austrian LEZs before long.
A) a copy of the vehicle registration documents.
B) the CEMT document or other document or datasheet that states the emission class of the vehicle.
This is the documents were the emission class is documented. It can also be a link /printout with weblink to the eg UK (or German or Italian etc) database that states what Euro class that vehicle registration vehicle.
C) Your VAT-number.
The price of each sticker is € 20,- excl. taxes and mailing costs. An invoice will be sent with the stickers, that should then be paid by bank transfer to DEKRA.
Delivery time: 5 business days.
The email should be in English or German. The vehicle and Emissions standard documents can be in any language.