Order of the General Court (Eighth Chamber) of 20 December 2023.#Merel Johanna Willemsen v European Commission.#Action for annulment – Research and technological development – Grant agreement concluded in the context of the ‘Horizon 2020’ Framework Programme for Research and Innovation (2014-2020) – Decision establishing a pecuniary obligation and forming an enforceable decision – Article 299 TFEU – Article 76(d) of the Rules of Procedure – Failure to comply with procedural requirements – Inadmissibility.#Case T-174/23.