Oregon Revised Statutes Cities § 223.450

When the reassessment is duly made it shall be entered in the lien docket of the local government. All provisions for bonding and paying by installments shall be applicable, and such liens of the local government shall be enforced and collected in the manner provided for collection of liens for an original local improvement. All sums paid upon the former final assessment or any previous reassessment shall be credited to the property on account of which it was paid and as of the date of payment.