21.1 Commission Implementing Regulation (EU) 2021/1880 of 26 October 2021 correcting the Polish language version of Implementing Regulation (EU) 2019/317 laying down a performance and charging scheme in the single European sky - European Air Law View the chapter 21.1 Commission Implementing Regulation (EU) 2021/1880 of 26 October 2021 correcting the Polish language version of Implementing Regulation (EU) 2019/317 laying down a performance and charging scheme in the single European sky by - European Air Law 21.1 Commission Implementing Regulation (EU) 2021/1880 of 26 October 2021 correcting the Polish language version of Implementing Regulation (EU) 2019/317 laying down a performance and charging scheme in the single European sky