When a certified copy of the findings and order approving the proposal is filed with the governing body as provided in ORS 454.305 (Effect of findings), 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 (Definitions for ORS 454), 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. [1983 c.235 §2]