ORS 223.245

The interest on the bonds and the amounts of the installments of maturing bonds shall be included in the annual budget of the issuing local government. There shall be deducted in the budget the amount that the governing body conservatively estimates will be received from payments of the principal of and interest on installments of final assessments appertaining to the particular bond issue, and from receipts from sales and rentals of property acquired by the local government pursuant to the assessments, during the fiscal year.