Joined Cases C-167/19 P and C-171/19 P: Judgment of the Court (Fourth Chamber) of 10 March 2022 — European Commission v Freistaat Bayern and Others (Appeal — State aid — Aid in favour of the German dairy sector — Financing of milk quality tests — Article 108(2) TFUE — Decision to initiate the formal investigation procedure — Regulation (EC) No 659/1999 — Article 6(1) — Obligation for the European Commission to summarise the relevant issues of fact and law in that decision — Scope — Rights of interested parties to be involved in the administrative procedure — Breach of an essential procedural requirement — Consequences for the lawfulness of the final decision)