Case C-417/13: Judgment of the Court (Second Chamber) of 28 January 2015 (request for a preliminary ruling from the Oberster Gerichtshof — Austria) — ÖBB Personenverkehr AG v Gotthard Starjakob (Reference for a preliminary ruling — Social policy — Directive 2000/78/EC — Equal treatment in employment and occupation — Article 2(1) and (2)(a) — Article 6(1) — Discrimination based on age — National legislation under which inclusion of periods of service completed before the age of 18 for the purpose of determining remuneration is subject to an extension of the periods for advancement — Justification — Whether appropriate for the purpose of achieving the objective pursued — Possibility of challenging the extension of the periods for advancement)