Question juridique clé
Whether the father's appeal was admissible without a written power of attorney from his adult son.
Solution extraite
Yes. A person who regularly supports and permanently cares for the insured under Art. 66(1) IVV may pursue the claim and challenge the decision on appeal without a separate power of attorney.
Motifs extraits
The father's standing followed from his role as a regular supporter and permanent caregiver; this sufficed for both claim assertion before the administration and appellate standing under Art. 59 ATSG and Art. 66(1) IVV.