Case C-312/12: Order of the Court (Sixth Chamber) of 21 February 2013 (request for a preliminary ruling from the Labour Court, Huy — Belgium) — Agim Ajdini v Belgian State (Rules of Procedure — Articles 53(2), 93(a) and 99 — Request for a preliminary ruling — Examination of the conformity of a national provision with both European Union law and the national constitution — National legislation granting priority to an interlocutory procedure for the review of constitutionality — Charter of Fundamental Rights of the European Union — Failure to implement European Union law — Clear absence of jurisdiction of the Court)