Thanks for your generous reply especially during weekend!

"if I understood right, as one key person for 6 years, you will have the right or possibility to apply for the nationality". This means that 6 year is counted since a key person got the Niederlassungsbewilligung other than the 5 -year residence card.

How difficult it is for a key person to obtain the nationality after 6 years nowdays in Austria?

How long for a person who is a north American citizenship to apply for a Austrian nationality?

Nice weekend!