Question juridique clé
Whether the pension could be revoked under Art. 17 ATSG due to a relevant change in health or earning capacity.
Solution extraite
The revocation was permissible because the insured's earning capacity became fully practically usable and this constituted a substantial change in the invalid income.
Motifs extraits
Although the medical findings did not show a relevant deterioration or improvement, the economic situation changed materially: work capacity that had existed since 1998 became effectively exploitable, the workload increased, and the self-employed business developed from hobby-like activity into a professional income source.