ORS § 476.580
The Governor may make, amend and rescind such orders, rules and regulations as are necessary or advisable to carry out the provisions of ORS 476.530 and 476.540. Any order issued by the Governor in relation to carrying out the provisions of ORS 476.520 to 476.610 may be either written or oral. If written, a copy thereof shall be filed in the office of the Secretary of State and another copy dispatched forthwith to the chief executive of any county, city or fire protection district affected. Immediately thereafter such order, rule or regulation shall be in effect. Oral orders may be made by the Governor when in the opinion of the Governor the emergency is such that delay in issuing a written order would be dangerous to the welfare of the people of the state. However, written copies of such oral order shall be filed and dispatched as soon after issuing such oral order as is conveniently possible in the manner above provided for written orders.
ORS 476.580