Question juridique clé
Whether the public-law appeal met the reasoning requirements of Art. 42 BGG.
Solution extraite
The appeal was not sufficiently reasoned and therefore could not be examined on the merits.
Motifs extraits
The submission failed to explain in a focused manner how the challenged decision violated the law. Later letters did not cure the defect, and the court could not set a cure period because the defect was substantive rather than a formal omission covered by Art. 42(5) or (6) BGG.