A majority of the commissioners shall constitute a quorum for the transaction of any business, for the performance of any duty, or for the exercise of any power of the commission. No single vacancy in the commission shall impair the right of the remaining commissioners to exercise all the powers of the commission. The act of the majority of the commissioners when in session as a board shall be deemed to be the act of the commission; but any investigation, inquiry or hearing which the commission has power to undertake or hold may be undertaken or held by or before any commissioner or hearing examiner designated for that purpose by the commission, and every finding, order or decision made by a commissioner or hearing examiner so designated, pursuant to such investigation, inquiry or hearing, when approved and confirmed by the commission and ordered filed in its office, shall be and be deemed to be the finding, order or decision of the commission. The commission may designate the hearing examiner to represent the commission in actions and proceedings in lieu of an attorney appointed by the attorney general under section 61-204, Idaho Code, as amended, in which event the attorney general will appoint only an attorney to represent the people of the state of Idaho.