Case T-903/16: Judgment of the General Court of 14 February 2019 — RE v Commission (Personal data — Protection of natural persons with respect to the processing of their data — Right of access to those data — Regulation (EC) No 45/2001 — Refusal to grant access — Actions for annulment — Email referring to an earlier partial refusal of access without carrying out a re-examination — Concept of a challengeable act within the meaning of Article 263 TFEU — Concept of a purely confirmatory act — Applicability to access to personal data — Substantial new facts — Interest in bringing proceedings — Admissibility — Obligation to state reasons)