The hearings board shall consist of three members qualified by experience or training in pertinent matters pertaining to the environment, and at least one member of the hearings board shall have been admitted to practice law in this state and engaged in the legal profession at the time of his or her appointment. The hearings board shall be appointed by the governor with the advice and consent of the senate, and no more than two of whom at the time of appointment or during their term shall be members of the same political party.