Case T-763/18: Order of the General Court of 18 December 2019 — Lazarus Szolgáltató és Kereskedelmi v Commission (Action for annulment — State aid — Allegedly unlawful aid implemented by Hungary in favour of undertakings employing disabled workers — Alleged Commission decisions declaring the aid measure compatible with the internal market — Time limit for bringing an action — Point from which time starts to run — Knowledge acquired — Proof — Duty of diligence — Act not open to challenge — Inadmissibility)