Judgment of the Court (First Chamber) of 28 October 2020.#BY and CZ v Bundesrepublik Deutschland.#Request for a preliminary ruling from the Oberverwaltungsgericht für das Land Nordrhein-Westfalen.#Reference for a preliminary ruling – Directive 1999/62/EC – Directive 2006/38/EC – Charging of heavy goods vehicles for the use of certain infrastructures – Article 7(9) – Article 7a(1) and (2) – Tolls – Principle of the recovery of infrastructure costs – Infrastructure costs – Operating costs – Costs related to traffic police – Cost overrun – Direct effect – Ex post justification of an excessive toll rate – Limitation of the temporal effects of the judgment.#Case C-321/19.