Former director(s), commissioners, employees of the director, and the assistant attorney general assigned to the director and/or the commission shall not appear in a representative capacity on behalf of any party in a formal proceeding before the director, the director's designated administrative law judge or presiding officer, or the commission unless:

(1) The appearance is more than two years after the person severed their relationship or employment; and

(2) The person did not take an active part on behalf of the director or commission in the matter being decided.