Case C-942/19: Judgment of the Court (Seventh Chamber) of 3 June 2021 (request for a preliminary ruling from the Tribunal Superior de Justicia de Aragón — Spain) — Servicio Aragonés de Salud v LB (Reference for a preliminary ruling — Social policy — Framework agreement on fixed-term work concluded by ETUC, UNICE and CEEP — Clause 4 — Principle of non-discrimination — Rejection of a request for leave of absence by reason of employment in the public sector provided for permanent staff regulated under administrative law — National legislation excluding entitlement to such leave when taking up temporary employment — Scope — Inapplicability of clause 4 — Lack of jurisdiction of the Court)