Case C-27/20: Judgment of the Court (Eighth Chamber) of 12 May 2021 (request for a preliminary ruling from the Tribunal de grande instance de Rennes — France) — PF, QG v Caisse d’allocations familiales (CAF) d’Ille-et-Vilaine (Reference for a preliminary ruling — Freedom of movement for workers — Equal treatment — Social advantages — Ceilings related to resources — Account taken of the resources received in the penultimate year preceding the period of payment of allowances — Worker returning to his Member State of origin — Reduction in the entitlement to family allowances)