The Department of Conservation and Natural Resources shall be headed by and shall be under the direction, supervision and control of an officer who shall be known and designated as the Commissioner of Conservation and Natural Resources. The Commissioner of Conservation and Natural Resources shall be the advisor of the Governor and the Legislature in matters relating to the wildlife and other natural resources and the state parks and monument and historical sites of the State of Alabama and the discovery, development, protection and conservation thereof. He shall be responsible to the Governor for the administration of the Department of Conservation and Natural Resources. The Commissioner of Conservation and Natural Resources shall be appointed and shall hold office at the pleasure of the Governor. Vacancies for any reason shall be filled in the same manner as original appointments are made. Before entering upon the discharge of his duties, the Commissioner of Conservation and Natural Resources shall take the constitutional oath of office and shall give bond in such penalty as may be fixed by the Governor, but such penalty shall not be less than $10,000.00 conditioned upon the faithful discharge of his duties. The premiums on such bond shall be paid out of the State Treasury. The Commissioner of Conservation and Natural Resources shall devote full time to his office and shall not hold another office under the government of the United States or under any other state or of this state or any political subdivision thereof during his incumbency in such office, and shall not hold any position of trust or profit or engage in any occupation or business the conduct of which shall interfere or be inconsistent with his duties as Commissioner of Conservation and Natural Resources under the provisions of this title.