Opinion of Advocate General Pikamäe delivered on 13 June 2019.#Deutsche Post AG and Klaus Leymann v Land Nordrhein-Westfalen.#Request for a preliminary ruling from the Oberverwaltungsgericht für das Land Nordrhein-Westfalen.#Reference for a preliminary ruling — Regulation (EC) No 561/2006 — Road transport — Social legislation — Vehicles used to deliver items as part of the universal postal service — Exceptions — Vehicles partly used for such delivery — Directive 97/67/EC — Article 3(1) — ‘Universal service’ — Concept.#Case C-203/18.