Oregon Revised Statutes Public Health and Safety § 450.150

(1) The board shall appoint a time for the hearing of remonstrances or objections against any proposed improvement regardless of the method of payment. At the time appointed all objectors or remonstrators shall have the right to be heard.

(2) If two-thirds or more of the owners of the property directly benefited, which is liable for any of the cost of the sewers, drains or sewage disposal plants, file written remonstrances objecting to the proposed improvement, the board shall sustain the remonstrances, and no further proceedings in the matter of proposed improvements shall be had for a period of six months.

(3) If two-thirds of the owners of the property directly benefited by the proposed improvements do not file written remonstrances against the improvement, the board may proceed with the making of the improvement.