Or. Rev. Stat. § 316.056
(1) In addition to the modifications to federal taxable income contained in this chapter, there shall be subtracted from federal taxable income, to the extent includable in gross income for federal income tax purposes, the interest or dividends on obligations of:
[1987 c.293 §23b; 1989 c.988 §1; 2007 c.783 §126; 2015 c.548 §5]