ORS § 545.573
The board of directors shall sit as a board of equalization at the time and place stated in the notice, and shall continue in session from day to day as long as may be necessary to hear and determine any objections, remonstrances or suggestions by any interested persons to the proposed assessment and apportionment or to the proposed determination of the total benefits accruing to a legal subdivision or other described tract. The board shall change its assessments and apportionment or determination of the total benefits accruing as the board considers necessary and proper so as to make the assessments, apportionment and determination of benefits legal, just and in accordance with the facts. The secretary of the board shall be present during these sessions and shall note all changes made in the assessments or determination of total benefits.
ORS 545.573