Case C-277/21: Judgment of the Court (Tenth Chamber) of 28 April 2022 (request for a preliminary ruling from the Conseil d’État — Belgium) — Secrétariat général de l’Enseignement catholique ASBL (SeGEC) and Others v Institut des Comptes nationaux (ICN), Banque nationale de Belgique (Reference for a preliminary ruling — Regulation (EU) No 549/2013 — European system of national and regional accounts in the European Union — Annex A, paragraph 20.15 — Control exercised by an institute of national accounts over the organising authorities of educational establishments constituted in the form of non-profit institutions — Educational establishments receiving public financing and enjoying freedom of education guaranteed by the Constitution — Annex A, paragraph 20.15, second sentence — Concept of ‘public intervention in the form of general regulations applicable to all units working in the same activity’ — Scope — Annex A, paragraph 20.15, first sentence — Annex A, paragraph 2.39(b), paragraph 20.15(b) and paragraph 20.309(h) — Concept of ‘excessive regulation’ — Scope)