The State Entomologist shall issue to regular nurseries certificates, valid until the first day of August following the date of issue and covering the stock inspected and such other stock as has been received under valid certificates of inspection, and may issue temporary permits covering certain portions thereof, and permits to dealers. All such certificates and permits may be revoked for cause. Nursery stock which has not been inspected or stock from a nursery not holding a valid certificate of inspection shall not be sold or transported, and transportation companies shall refuse to accept any shipment not bearing such certificate or some form of permit issued by the State Entomologist, and all nurserymen shall furnish a certificate, and all dealers a permit, to accompany each package of stock sold or transported, but no provision of § 22-98 or 22-99 or this section shall prevent or render liable any person or firm transporting stock from one field or property to another field or property belonging to or operated by such person or firm when such stock is not to be immediately sold or offered for sale and when such transportation does not violate any established federal or state embargo or quarantine regulations.