(a) Reapplications shall be processed in the same way as new applications. When an individual reapplies after he has been certified as AD—Group I or Group II—and his case is closed for reasons unrelated to a change in disability (e.g., increased social security or other benefits) there is no need for a review team evaluation unless:

1. (1) twelve months or more have elapsed since date of last case closing;
2. (2) the individual has, in the interim, engaged in a useful occupation; or
3. (3) the individual has, in the interim, had a significant change in treatment such as major surgery, a stay in a rehabilitation center or a period of diagnostic hospitalization.