The Department shall have authority to inspect any place which might become infested or infected with insect pests or diseases. It shall also have authority to inspect or reinspect at any time or place any nursery stock shipped into the State. For the purpose of inspection and carrying out the provisions of this Act, the Director shall have free access to any field, orchard, garden, packing ground, building, cellar, freight or express office, warehouse, car or other vehicle, vessel, or other place where it may be necessary or desirable for them to go, or which it may be necessary for them to inspect, in the performance of their duties. The nurseryman or nursery dealer shall provide assistance as may be necessary for any inspection or examination made in accordance with this Act and rules. It shall be unlawful to deny such access to the Director, or to offer any resistance to the officers and employees of the Department, or to thwart or hinder such inspection by misrepresenting or concealing facts, or conditions, or otherwise.
     Department personnel shall not be personally liable for damage or injury resulting from the performance of their duties.