Oregon Revised Statutes Cities § 224.090

No assessment under ORS 224.040 against property beyond the limits of the city shall be a lien on the property until a certified transcript of the assessment in so far as it affects such property has been filed with the county clerk or other person having custody and charge of the mortgage records of the county. From the date of such filing the assessment shall be a lien and charge against the property upon which it is imposed, prior and superior to all other liens and encumbrances whatsoever thereon, except general taxes.