Every person engaged in the nursery business at a place without this State who ships trees or plants into this State shall have them examined by the State Crop Pest Commission, and no such shipment shall be made until and unless such plants have been inspected by the Commission and shall have had placed thereon a tag prepared by the Commission, showing that such trees or plants have been duly inspected and are free from disease.

The provisions of this section shall not apply to persons engaged in the nursery business in any state which recognizes and accepts the inspection made by the Commission on shipments made from this State.