The commission shall elect a chairman and such other officers as it deems necessary. It shall meet on the call of the chairman or upon the request of a majority of the members, and shall meet at least twice a year. A majority of the commission shall constitute a quorum for transacting business. The members shall serve without compensation, but shall be allowed the usual per diem and mileage as provided by law for members of boards, commissions and committees while on business of the commission.