Oregon Revised Statutes Cities § 223.640

In any suit authorized by ORS 223.610, it shall be a sufficient allegation of jurisdictional facts authorizing the local government to make and levy any lien if the complaint alleges in general terms that the local improvement was made in the manner and as provided by law, by the local government's charter, ordinances, resolutions, or any of them, relating to such local improvement. It is not necessary to specifically set forth in the complaint any such charter provisions, ordinances or resolutions.