CELEX:62021CJ0681: Judgment of the Court (Seventh Chamber) of 27 April 2023.#Versicherungsanstalt öffentlich Bediensteter, Eisenbahnen und Bergbau (BVAEB) v BB.#Reference for a preliminary ruling – Social policy – Equal treatment in employment and occupation – Directive 2000/78/EC – Prohibition of discrimination on grounds of age – Retirement pension – National legislation providing, with retroactive effect, for a category of civil servants previously advantaged by the national legislation relating to retirement pension rights to be treated in the same way as a category of civil servants previously disadvantaged by that legislation.#Case C-681/21.