Question juridique clé
Whether the federal appeal was admissible, including new facts raised after the cantonal judgment.
Solution extraite
The appeal was formally admissible, but post-judgment facts and new arguments in reply could not be considered.
Motifs extraits
The Convention of 13 December 2010 was a true nova post-dating the cantonal judgment, and the reply could not be used to raise new grievances already possible in the initial appeal.