Judgment of the Court (Eighth Chamber) of 2 April 2020.#CO v Comune di Gesturi.#Request for a preliminary ruling from the Tribunale Amministrativo Regionale per la Sardegna.#Reference for a preliminary ruling — Social policy — Principle of equal treatment in employment and occupation — Directive 2000/78/EC — Prohibition of all discrimination on grounds of age — Public call for expressions of interest — Conditions of participation — Exclusion of retired public-sector and private-sector employees.#Case C-670/18.