Short-term parking – permanent parking permit („Parkpickerl“) for residents https://www.wien.gv.at/english/e-government/transportation/parking/residents/parking-permit.html
Persons with their primary residence in the districts 1 to 9 and 20 or in the area around Stadthalle in the 15th district can be issued a certificate of exemption pursuant to Art. 45 (4) Austrian Federal Road Traffic Act.
steps if your circumstances change I have got a new car (number plates remain the same