"Department" means the Washington state department of agriculture.

"Eastern filbert blight" means a disease of hazelnut plants caused by the fungus Anisogramma anomala.

"Hazelnut plant" means plants and plant parts of any species in the genus Corylus.

"Micropropagate" means plant propagation using aseptic laboratory techniques and artificial culture medium.

"Pest free area" means an area where eastern filbert blight does not occur, as demonstrated by scientific evidence, and where this condition is being officially maintained.

"Phytosanitary certificate" means a certificate issued by a government agency under authority of state or federal statute, which declares or establishes the pest status of a shipment of plants or plant parts under accepted inspection or sampling procedures. Phytosanitary certificates are patterned after model certificates of the International Pest Protection Convention.