Opinion of Advocate General Campos Sánchez-Bordona delivered on 21 September 2023.#Die Länderbahn GmbH and Others v Bundesrepublik Deutschland.#Request for a preliminary ruling from the Verwaltungsgericht Köln.#Reference for a preliminary ruling – Rail transport – Directive 2012/34/EU – Access to railway infrastructure – Charges – Article 56 – Single national regulatory body for the railway sector – Powers – Review of the infrastructure charges whose period of application has expired – Power to declare invalidity with effect ex tunc and to order the reimbursement of charges.#Case C-582/22.