Any tax or assessment upon land shall be a lien against the property assessed or taxed, and such lien for all payments due or to become due under any contract with the United States or for the payment of principal or interest of bonds deposited with the United States shall be a preferred lien to any assessments for bonds issued subsequent to the date of such contract or the issuance of the bonds deposited with the United States. No subdistrict tax or assessment lien shall be removed until the assessments or tax is paid with interest and penalties or the property sold for the payment thereof.
ORS 553.660