The commissioners of each commission shall select from among themselves a chairman, a vice-chairman, and such other officers as the commission may determine. A commission may employ technical experts and other agents and employees, permanent or temporary, as it may require, and may determine the qualifications and fix the compensation of such persons. A majority of the commissioners then in office shall constitute a quorum for its meeting. No commissioner is liable personally for losses unless the losses are occasioned by the willful misconduct of such commissioner. A commission may delegate to one or more of its members, agents, or employees such of its powers as it deems necessary to carry out the purposes of this chapter, subject always to the supervision and control of the whole commission.