Opinion of Advocate General Pitruzzella delivered on 4 June 2020.#Crown Van Gelder BV v Autoriteit Consument en Markt.#Request for a preliminary ruling from the College van Beroep voor het bedrijfsleven.#Reference for a preliminary ruling – Internal market for electricity – Directive 2009/72/EC – Article 37 – Duties and powers of the regulatory authority – Out-of-court dispute settlement – Concept of ‘party having a complaint’ – Complaint submitted by a final customer against the operator of a transmission system to which that customer’s installation is not directly connected – Failure on the grid – No contractual relationship between that customer and the operator of that grid – Admissibility of the complaint.#Case C-360/19.