Opinion of Advocate General Rantos delivered on 24 February 2022.#Danske Slagtermestre v European Commission.#Appeal – State aid – Article 107(1) TFEU – Contributions scheme for the collection of waste water – Complaint – Decision finding that there is no State aid – Action for annulment – Admissibility – Locus standi – Fourth paragraph of Article 263 TFEU – Regulatory act not entailing implementing measures – Direct concern.#Case C-99/21 P.