2015 ORS § 366.550¹
Historic Columbia River Highway defined

As used in ORS 366.550 (Historic Columbia River Highway defined) to 366.553 (Advisory committee), Historic Columbia River Highway means all parts of the original Columbia River Highway, constructed between 1913 and 1922, in Multnomah, Hood River and Wasco Counties, that have been designated as a Historic and Scenic Highway under ORS 377.100 (Study of highway system) and all properties and structures that are within the Columbia River Highway Historic District, National Register of Historic Places. [1987 c.382 §1]

Note: 366.550 (Historic Columbia River Highway defined) to 366.553 (Advisory committee) were enacted into law by the Legislative Assembly but were not added to or made a part of ORS chapter 366 or any series therein by legislative action. See Preface to Oregon Revised Statutes for further explanation.