Section 454.317 - Resolution or ordinance authorizing levy and collection of seepage charge(1) When a certified copy of the findings and order approving the proposal is filed with the governing body as provided in ORS 454.305, the governing body may adopt a resolution or ordinance authorizing the levy and collection of a seepage charge upon all real properties served by on-site subsurface sewage disposal systems, as defined in ORS 454.605, within the boundaries of the affected area.(2) A resolution or ordinance adopted under this section shall authorize the levy and collection of a seepage charge only in an affected area located entirely within a single drainage basin as identified in regional treatment works plans.(3) A resolution or ordinance adopted under this section shall: (a) Describe the boundaries of the affected area; and(b) Contain an estimate of the commencement and completion dates for the proposed treatment works and a proposed schedule for the extension of sewer service into the affected area.