EASA published Notice of Proposed Amendment on operations in the single European sky (SES) airspace - May 26, 2023, open for comments until Aug. 28.
https://www.easa.europa.eu/en/newsroom-and-events/news/easa-published-n…

EASA has published a regulatory proposal to enable and support operations (including of Helicopters) in the single European sky (SES) airspace.

NPA 2023-04 addresses two different subject matters: the use of airborne collision avoidance system (ACAS) Xa and the harmonised use of performance-based navigation (PBN) specifications for oceanic operations.

The proposal enables the use of ACAS Xa in the SES airspace, as one of the SES ATM Research (SESAR) solutions adopted as ICAO standard.