(1) The Trust may at any time review an invalidity determination. The Trust must review it at least once every 2 years.
(2) If, after reviewing an invalidity determination, the Trust is satisfied that the deferring member would no longer be unable, because of physical or mental impairment, to perform the duties of a member if he or she were still a member, then the Trust may revoke the determination.
(3) The revocation takes effect on the day it is made or on a later day specified in the revocation.
(4) The Trust must give the deferring member a written notice of the revocation.