ORS 223.129: Expenditure of assessment revenues; liability for unauthorized expenditures.

(1) A city council shall not expend any moneys derived from assessments levied under ORS 223.112 to 223.132 for any purpose different from the purpose described in the ordinance adopted under ORS 223.114.

      (2) Any public official who expends any moneys derived from assessments levied under ORS 223.112 to 223.132 for any purpose different from the purpose described in an ordinance adopted under ORS 223.114 shall be civilly liable for the return of the moneys by suit of the district attorney of the county in which the city is located or by suit of any taxpayer of the city.