Case T-620/11: Judgment of the General Court of 4 February 2016 — GFKL Financial Services v Commission (State aid — German tax legislation concerning loss carry-forward to future tax years (Sanierungsklausel) — Decision declaring the aid incompatible with the internal market — Action for annulment — Individual concern — Admissibility — Concept of State aid — Selectivity — Nature and general scheme of the tax system — State resources — Obligation to state reasons — Legitimate expectations)