C-413/20État belge v LO and Others

Domstolens egne nøkkelord

Reference for a preliminary ruling – Air transport – Regulation (EU) No 1178/2011 – Technical requirements and administrative procedures related to civil aviation aircrew – Points 9 and 10 of Subpart A of Appendix 3 to Annex I – Training course for the issue of a commercial pilot licence – Flying training – Instrument ground time – Calculation – Simulator training – Skill test – Principle of legal certainty – Temporal limitation of the effects of a preliminary ruling.

Tolker