A judicial officer who has a commercial relationship with one of the litigants appearing before him or her is under a duty to disclose that relationship to the parties, regardless of whether there is a direct pecuniary interest in the outcome of the case. The test for reasonable apprehension of bias is whether a reasonable, objective and informed person would on the correct facts reasonably apprehend that the judge has not or will not bring an impartial mind to bear on the adjudication. Where a judicial officer fails to make disclosure of a material commercial relationship when required to do so, and proceeds to hear the matter, the proceedings are a nullity. In the context of an attorney in private practice acting as a judge, where the attorney's firm has done and continues to do work for one of the litigants, there is a reasonable apprehension that the judicial officer may not be impartial, particularly where the case involves credibility assessments between the litigant-client and its employees.