1. Commission Implementing Regulation (EU) 2021/666 of 22 April 2021 amending Regulation (EU) No 923/2012 as regards requirements for manned aviation operating in U-Space airspace;Official Journal of the European Union,2021
2. Commission Implementing Regulation (EU) 2021/665 of 22 April 2021 amending Implementing Regulation (EU) 2017/373 as regards requirements for providers of air traffic management/air navigation services and other air traffic management network functions in the U-Space airspace designated in controlled airspace;Official Journal of the European Union,2021
3. Acceptable Means of Compliance and Guidance Material to Regulation (EU) 2021/664 on a regulatory framework for the U-Space;AMC and GM to Regulation 2021/664,2022
4. Commission Implementing Regulation (EU) 2021/664 of 22 April 2021 on a regulatory framework for the U-Space;Official Journal of the European Union,2021