Nothing in ORS 311.666 to 311.701 is intended to or shall be construed to:
(1) Prevent the collection, by foreclosure, of property taxes which become a lien against tax-deferred property.
(2) Defer payment of special assessments to benefited property which assessments do not appear on the assessment and tax roll.
(3) Affect any provision of any mortgage or other instrument relating to land requiring a person to pay property taxes.