Question juridique clé
Whether the Republic and Canton of Geneva, acting through the Service des prestations complémentaires, had standing to appeal under Art. 89 LTF
Solution extraite
The canton, acting in the exercise of public authority, lacked standing because the dispute concerned only cantonal autonomous subsidy law and no autonomy violation or other special appeal right was shown.
Motifs extraits
Art. 89 al. 2 let. d LTF did not apply because it covers enforcement of federal law, not purely cantonal subsidy rules. Under Art. 89 al. 1 LTF, the canton did not claim a protected interest based on autonomy; its financial burden and interest in correct application of the law were insufficient.