Judgment of the General Court (Third Chamber) of 13 December 2023.#Global Nanotechnologies AE schediasmou anaptyxis paraskevis kai emporias ylikon nanotechnologias (Glonatech) v European Research Executive Agency.#Arbitration clause – Seventh Framework Programme for research, technological development and demonstration activities (2007-2013) – Grant agreement – The SANAD Project – Staff costs – Burden of proof – Eligible costs – Recovery demand – Debit note – Counter-claim.#Case T-409/22.