Questione giuridica chiave
Whether the conditions for revising and revoking the helplessness allowance were met.
Decisione estratta
No. The prerequisites for revision were not satisfied, and no reopening ground justified ending the ongoing benefit.
Motivazione estratta
The cantonal court correctly found that neither Article 17 ATSG nor, alternatively, Article 53 ATSG provided a basis to revoke the benefit. The Federal Supreme Court endorsed that reasoning.