As mandated by Article 19e (4) of Regulation (EU) 2019/943, which was introduced by the Electricity Market Design Reform (EMDR) Regulation (EU) 2024/1747, ENTSO-E and the EU DSO Entity were tasked with jointly developing the type and format of data, as well as a methodology for analysing flexibility needs at the national level. To this end, the Associations established a joint task force to prepare the proposal defining the required data formats, types, and analytical approach for flexibility needs assessments (FNAs) by system operators. This proposal was successfully submitted to ACER within the nine-month deadline and formally approved in July 2025, marking the official launch of the FNAs at the Member State level. Going forward, ENTSO-E and the DSO Entity will support TSOs and DSOs during the implementation phase, including by coordinating the data and analysis required for the preparation of national FNA reports in line with the methodology, and by providing guidance on recurring implementation challenges faced by system operators.