Questione giuridica chiave
Whether the nullity appeal was admissible under federal procedural law.
Decisione estratta
The appeal was admissible because the Vaud judgment on appeal in a federal-contravention case was final and not subject to a cantonal remedy.
Motivazione estratta
The cantonal statute made such appellate judgments final; the Vaud district court acted as a second cantonal instance, not a unique cantonal instance.