(b) The adjudicating official may require that another oral hearing be held on one or more of the issues in controversy, or permit the dissatisfied party to present further evidence or argument in writing, if the adjudicating official finds that the individual has:

1. (1) Presented evidence or argument that is sufficiently significant to require the conduct of further proceedings; or
2. (2) Shown some defect in the conduct of the adjudication under this subpart sufficient to cause substantial unfairness or an erroneous finding in that adjudication.