Oregon Revised Statutes Agriculture § 561.510

(1) The Director of Agriculture may adopt rules under ORS chapter 183 declaring a quarantine if the director believes that any animals, fowls, bees, fruits, vegetables, plants, parts of plants or seeds within any area or section are diseased or infested with a pest, or that any area or section is infested with a weed, and that the disease, infestation or weed is likely to spread and become detrimental to the plant or animal life of this state or to the health of citizens of the state. The director may declare the quarantine for any area or section for which the Secretary of Agriculture of the United States has not determined that a quarantine is necessary and established a quarantine. The quarantine may prohibit:

(2) Except as provided in subsection (3) of this section, the director shall hold at least one public hearing in this state before adopting a rule that declares a quarantine under this section.

(3) If an emergency exists and postponement of the effective date of the quarantine would result in serious prejudice to the public health, safety or welfare, or to the health, safety or welfare of the affected parties, the director may make the quarantine effective immediately as authorized by ORS 183.355 (2)(b).