(2) Each notice shall be posted in a prominent place in the county courthouse and shall be published in one or more newspapers serving the district, for two consecutive issues if weekly or two times at an interval of one week if daily or semiweekly.
(3) Ten days after the last publication of the official notice the provisions of ORS 568.810 to 568.890 shall be enforced as set forth in ORS 568.840 to 568.890.