(a)      The chief elected official shall designate which of the commissioners appointed at the time of initial activation of an authority shall be the first chairman, but when the office of the chairman of the authority thereafter becomes vacant, the authority shall select a chairman from among its commissioners. An authority shall select from among its commissioners a vice-chairman, and it may employ a secretary (who shall be executive director), technical experts and other officers, agents and employees, permanent and temporary, and shall determine their qualifications, duties, and compensation.

      (b)      For the legal services it may require, an authority may call upon the chief law officer of the local government or may employ its own counsel and legal staff.

      (c)      An authority may delegate to 1 or more of its agents or employees the powers or duties it may deem proper.