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, his or her designated administrative law judge or the commission unless:

(1) The appearance is more than two years after he or she severed his or her relationship or employment and

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