Commodities under quarantine for designated chestnut pests are prohibited entry into Washington state from areas under quarantine (see WAC 16-470-410) except as provided below:

(1) Commodities under quarantine produced in Arizona, California, Idaho, Nevada, Oregon and Utah may be shipped into Washington state: Provided, That each shipment is identified by proper origin certification stating the shipment originated in that state.

(2) Commodities under quarantine produced in any area of Montana, Wyoming, Colorado, New Mexico, or any states east thereof may be shipped into Washington state: Provided, That each shipment is accompanied by a certificate bearing original or facsimile signature of the authorized agricultural official affirming that chestnut bark disease, large chestnut weevil, small chestnut weevil, nut curculio, and oriental chestnut gall wasp are not known to occur within the production area of the origin state.

(3) Commodities under quarantine produced in any area where chestnut bark disease, large chestnut weevil, small chestnut weevil, nut curculio, and oriental chestnut gall wasp are known to occur may be shipped into Washington state: Provided, That the commodities under quarantine have been treated in a manner recommended by the origin department of agriculture or university extension service and approved by the department. Each shipment shall be accompanied by a certificate bearing the original or facsimile signature of the authorized agricultural official stating the commodity is free from quarantined pests, and stating in detail the treatment used.

(4) No restrictions are placed on the nuts of all species and varieties of chestnut and chinquapin that are grown in and imported from foreign countries as regulated by the United States Department of Agriculture and reshipped into Washington state when shipped in unopened, original containers.

(5) In addition to all other penalties prescribed in WAC 16-470-015, all host material listed in WAC 16-470-430 entering Washington state in violation of this quarantine will immediately be shipped out of Washington or destroyed by the person or persons in possession of the material in a manner approved by the department at no cost to the department.