Section Env-AC 203.07 - Withdrawal of Presiding Officer(a) Upon individual initiative or upon the motion or request of any party, a presiding officer shall, for good cause or to avoid the appearance of impropriety or lack of impartiality, withdraw from serving as presiding officer for that appeal.(b) For purposes of this section, good cause means evidence of any fact that would cause a reasonable person to conclude that the presiding officer cannot be impartial.N.H. Admin. Code § Env-AC 203.07