With the approval of the Governor, the Commissioner of Conservation and Natural Resources may create and establish such additional division or divisions as may be determined to be necessary or convenient in the efficient and expeditious performance of the functions and duties of the Department of Conservation and Natural Resources and may assign functions and duties to such division or divisions, and he may transfer functions and duties from and to existing divisions from time to time. Directors of such divisions shall be appointed by the Commissioner of Conservation and Natural Resources with the approval of the Governor.