Key legal question
Whether the disability pension could be revoked under revision rules.
Extracted holding
The pension could not be revoked because the insured person's invalidity had not materially changed compared with the reference decision.
Extracted reasoning
The court accepted the administrative medical evidence only in part and found that the somatic limitations still justified a 50% work incapacity in adapted work. The resulting invalidity rate was 51%, so there was no substantial change from the earlier 50% rate.