Judgment of the General Court (Eighth Chamber, Extended Composition) of 10 February 2021.#Giacomo Santini and Others v European Parliament.#Institutional law – Single statute for Members of the European Parliament – Members of the European Parliament elected in Italian constituencies – Adoption by the Ufficio di Presidenza della Camera dei deputati (Office of the President of the Italian Chamber of Deputies, Italy) of Resolution No 14/2018, on pensions – Alteration of the amount of the pensions of Italian national Members of Parliament – Corresponding alteration by the European Parliament of the amount of the pensions of certain former Members of the European Parliament elected in Italy – Competence of the author of the act – Obligation to state reasons – Acquired rights – Legal certainty – Legitimate expectations – Right to property – Proportionality – Equal treatment – Non-contractual liability – Sufficiently serious breach of a rule of law conferring rights on individuals.#Joined Cases T-345/19, T-346/19, T-364/19 to T-366/19, T-372/19 to T-375/19 and T-385/19.