Promptly after their appointment the commissioners shall meet to organize. At such meeting they shall choose from their number a president, a secretary and such other officers as they deem necessary. Thereafter officers shall be elected annually. The commission shall adopt rules regulating the conduct of its meetings and the transaction of the business of the commission, and may appoint such agents and employees as it deems necessary, or may delegate to one or more of its members, officers, agents or employees such powers and duties as it deems proper.