(2) In such proceedings the board of directors shall be made parties defendant. Service of summons shall be made on the members of the board personally if within the county where the district or any part thereof is situated. As to any directors not within such county, service may be had by publication of summons for a like time and in like manner as provided by ORS 261.610. Service shall be deemed complete within 10 days from the date of personal service within the county and within 10 days from the date of completion of the publication, as the case may be.
(3) Such proceedings shall be tried and determined in the same manner as proceedings brought by the district itself.