Key legal question
Whether the pension cancellation could be upheld by procedural revision under Art. 53(1) ATSG
Extracted holding
The prerequisites for procedural revision were not met because the new materials did not reliably establish the facts as they stood at the time of the original pension award.
Extracted reasoning
The observation reports were not themselves sufficient proof of health and work capacity, and the later expert opinion mainly showed a changed or newly assessed condition rather than proving that the original 2008 award was incorrect.