Kernrechtsfrage
Whether the prior final denial fixed the hypothetical valid income and barred its re-examination on re-registration.
Extrahierter Entscheid
The earlier denial did not prevent re-examination of the income elements in light of the later deterioration; res judicata did not bar review.
Extrahierte Begründung
BGE 136 V 369 protects only settled, temporally completed prerequisites of entitlement. In a re-registration after deterioration, the assessment elements for the pension, including valid income, may be reviewed anew.