Austria has been punished by EU court for those extra checks. https://www.euronews.com/my-europe/2022/04/28/can-eu-countries-introduce-border-checks-between-ea

Austria has been punished by EU court for those extra checks. https://www.euronews.com/my-europe/2022/04/28/can-eu-countries-introduce-border-checks-between-each-other-this-is-what-the-ecj-says https://www.euronews.com/my-europe/2022/04/28/can-eu-countri...