Judgment of the General Court (Fourth Chamber, Extended Composition) of 7 June 2023.#TC v European Parliament.#Law governing the institutions – Rules governing expenses and allowances for Members of Parliament – Parliamentary assistance allowance – Recovery of sums unduly paid – Reasonable time – Burden of proof – Right to be heard – Protection of personal data – Article 9 of Regulation (EU) 2018/1725 – Article 26 of the Staff Regulations.#Case T-309/21.