Opinion of Advocate General Medina delivered on 3 March 2022.#ET v Ministerstvo životního prostředí.#Request for a preliminary ruling from the Nejvyšší správní soud.#Reference for a preliminary ruling – Protection of species of wild fauna and flora by regulating trade therein – Regulation (EC) No 338/97 – Article 8(3)(d) – Concept of ‘specimens of animal species that are born and bred in captivity’ – Regulation (EC) No 865/2006 – Article 1(3) – Concept of ‘breeding stock’ – Article 54(2) – Establishment of the breeding stock