Case C-63/19: Judgment of the Court (Fifth Chamber) of 14 January 2021 — European Commission v Italian Republic (Failure of a Member State to fulfil obligations — Article 258 TFEU — Directive 2003/96/EC — Taxation of energy products and electricity — Articles 4 and 19 — Regional law adopted by the autonomous region of a Member State — Contribution towards the purchase of petrol and diesel subject to excise duties — Article 6(c) — Exemption from or reduction of excise duty — Concept of ‘refunding all or part of’ the amount of taxation — No evidence of a link between that contribution and excise duties)