Deduction or adjustment for certain federal credits. If a taxpayer has taken a federal credit, which requires as a condition of the use of the federal credit the reduction of a corresponding deduction or basis, and the federal credit is not allowable for Oregon purposes, the taxpayer shall be allowed the deduction or appropriate adjustment to basis to derive Oregon taxable income. [1983 c.162 §17]

ORS 317.303 — under Chapter 317.