Case C-460/21: Order of the Court (Eighth Chamber) of 7 February 2022 (request for a preliminary ruling from the Tribunal Arbitral Tributário (Centro de Arbitragem Administrativa — CAAD) — Portugal) — Vapo Atlantic SA v Autoridade Tributária e Aduaneira (Reference for a preliminary ruling — Article 99 of the Rules of Procedure of the Court — Excise duties — Directive 2008/118/EC — Article 1(2) — Levying, for specific purposes, of other indirect taxes — ‘Specific purposes’ — Definition — Financing of a public undertaking holding the concession contract in respect of the national road network — Objectives of environmental sustainability and reducing accidents — Purely budgetary purpose — Refusal to reimburse a tax based on unjust enrichment — Conditions)