Unable to answer "Who is allowed to park here? Parking may be free or paid." – Parking Lot – way/706160808 via StreetComplete 62.2:

People with a valid ÖBB ticket can park here

Unable to answer "Do you have to pay to park here?" – Street-side Parking – way/361377738 via StreetComplete 61.1:

Not a parking space, you can use the vacuum cleaner after using the car wash here