(2) The board may suspend, without an order to show cause, any registration simultaneously with the institution of proceedings under ORS 475.145 or where renewal of registration is refused, if it finds that there is an imminent danger to the public health or safety which warrants this action. The suspension shall continue in effect until the conclusion of the proceedings, including judicial review thereof, unless sooner withdrawn by the board or dissolved by a court of competent jurisdiction. [1977 c.745 §11]