Oregon Revised Statutes Cities § 223.265

(1) The installments due and payable under an assessment contract shall be due and payable periodically as the governing body of the local government shall determine but shall not be due and payable over a term in excess of 30 years. Each installment is due and payable with interest as described under subsection (3) of this section.

(2) The installments and interest are payable to the treasurer by the property owner whose application to pay the cost of the local improvement by installments has been filed as provided in ORS 223.210.

(3) The amount of each installment (percentage of the total final assessment) shall be determined by the governing body of the local government and shall be as appears by the bond lien docket described in ORS 223.230. Each installment shall be due and payable with the accrued and unpaid interest on the unpaid balance of the final assessment amount at the rate per annum determined by the governing body of the local government under ORS 223.215.

(4) The first payment shall be due and payable on the date that the governing body shall determine, and subsequent payments shall be due and payable on subsequent periodic dates thereafter as shall have been determined by the governing body.