Case T-174/13 P: Judgment of the General Court of 23 January 2014 — Commission v BO (Appeal — Civil Service — Contractual agents — Social security — Reimbursement of transport costs — Transport costs incurred for linguistic reasons — Article 19(2) of the Joint rules on sickness insurance for officials of the European Communities — Paragraph 2.5 in Chapter 12 of Title II of the general implementing directives concerning the reimbursement of medical costs)