Judgment of the Court (Tenth Chamber) of 9 March 2023.#Francoise Grossetête v European Parliament.#Appeal – Law governing the institutions – Rules governing the payment of expenses and allowances to Members of the European Parliament – Amendment of the additional voluntary pension scheme – Individual decision fixing additional voluntary pension rights – Plea of illegality – Competence of the Bureau of the Parliament – Rights acquired or in the process of being acquired – Proportionality – Equal treatment – Legal certainty.#Case C-714/21 P.