Judgment of the Court (Eighth Chamber) of 5 March 2020.#Pensionsversicherungsanstalt v CW.#Request for a preliminary ruling from the Oberster Gerichtshof.#Reference for a preliminary ruling — Social security for migrant workers — Coordination of social security systems — Regulation (EC) No 883/2004 — Articles 3 and 11 — Matters covered — Benefits falling within the scope of the regulation — Classification — Sickness benefit — Invalidity benefit — Unemployment benefit — Person who has ceased to be insured under the social security system of a Member State after ceasing to be employed there and moving his or her place of residence to another Member State — Application for a rehabilitation allowance in the former Member State of residence and employment — Refusal — Determination of the legislation applicable.#Case C-135/19.