Given that Austrians who don’t get vaccinated by February face fines of up to €7,200 ($8,000) for non-compliance, those who refuse to pay would also face a 12 month jail sentence.
The amendment also orders people who are jailed to pay for their own imprisonment
https://summit.news/2021/12/10/unvaxxed-in-austria-could-be-imprisoned-for-a-year/