ORS § 358.509
If the county assessor, local landmark commission or governing body has reason to believe that property classified as historic property is not being maintained, rehabilitated or preserved as required under the preservation plan approved for the property, as amended, or as required under rules established by the Department of Revenue or the State Historic Preservation Officer, or otherwise no longer qualifies for classification and special assessment as historic property, the county assessor, local landmark commission or governing body shall request the State Historic Preservation Officer to determine if the property continues to qualify. The request shall be in writing and state the reasons why the continuing qualification is questioned. Upon receipt of the request, the State Historic Preservation Officer may initiate a continuing qualification review. If a review is initiated, the State Historic Preservation Officer or designee of the officer shall inspect the property and may take whatever steps are necessary to determine if the property continues to qualify for special assessment. The State Historic Preservation Officer shall notify the county assessor of the determination made pursuant to the request within 60 days after the request is received.
ORS 358.509