Judgment of the General Court (First Chamber) of 27 April 2022.#Sieć Badawcza Łukasiewicz – Port Polski Ośrodek Rozwoju Technologii v European Commission.#Arbitration clause – Grant agreement concluded in the context of the Seventh Framework Programme for research, technological development and demonstration activities (2007-2013) – Eligible costs – Request for reimbursement – Financial audit – OLAF investigation – Conflict of interest on account of family or emotional ties – Principle of good faith – Principle of non-discrimination on grounds of marital status – Legitimate expectations – Action for annulment – Debit notes – Acts inseparable from the contract – Act not open to challenge – Right to effective judicial review – Inadmissibility.#Case T-4/20.