Case C-274/18: Judgment of the Court (Third Chamber) of 3 October 2019 (request for a preliminary ruling from the Arbeits- und Sozialgericht Wien — Austria) — Minoo Schuch-Ghannadan v Medizinische Universität Wien (Reference for a preliminary ruling — Social policy — Framework Agreement on part-time work — Clause 4 — Principle of non-discrimination — Less favourable treatment of part-time workers in relation to full-time workers as regards their conditions of employment — Prohibition — National legislation fixing a maximum duration of fixed-term employment that is longer for part-time workers than for full-time workers — Principle of pro rata temporis — Directive 2006/54/EC — Equal treatment of men and women in matters of employment and occupation — Article 2(1)(b) — Concept of indirect discrimination on the ground of sex — Article 14(1)(c) — Employment and working conditions — Article 19 — Burden of proof)