Case C-60/21: Judgment of the Court (Sixth Chamber) of 10 March 2022 — European Commission v Kingdom of Belgium (Failure of a Member State to fulfil obligations — Article 45 TFEU — Article 28 of the Agreement on the European Economic Area — Free movement of workers — Direct taxation — Income tax — Deductions — Maintenance annuities — Equal treatment — Discrimination between resident and non-resident taxpayers)