Question juridique clé
Whether the federal filing against the cantonal norm was admissible despite a cantonally available constitutional review remedy.
Solution extraite
The filing was inadmissible because the cantonal constitutional complaint had to be exhausted first.
Motifs extraits
Under the LTF, direct review of cantonal norms is excluded when cantonal law provides a remedy; the Vaud constitutional court was competent to review the school law, so the federal court could not be seized before that avenue was used.