Each board member will file with the board's docket clerk a public disclosure of any interests whatsoever which such member may have in any way relevant to the jurisdiction of the board, including but not limited to any economic interest in wetlands or any advisory or other role in local or State government and any unit and political subdivision thereof. If any member of the board has engaged in any activity which interferes with or is in conflict with, or may be perceived as interfering with or being in conflict with, the hearing and decision of any given appeal from any decision, determination or order, such member shall disclose such activity in writing and abstain from decision or the hearing or decision of any such appeal.