Like checking whether a workplace rule at a large Hillsboro chip plant has any sensible connection to safety or efficiency, this standard asks only whether a government action is reasonably related to a legitimate public purpose. Rational basis review is the most deferential level of constitutional court review. A law usually survives if lawmakers could have had any conceivable legitimate reason for it, even if the fit is rough, the policy is imperfect, or the legislature did not spell out its reasoning. It generally applies when a law does not burden a fundamental right and does not classify people by a suspect classification such as race.

Practically, this standard makes constitutional challenges hard to win. The government does not have to prove the law is the best option, only that it is not irrational. Courts often uphold economic regulations, licensing rules, benefit limits, and procedural statutes under this test. By contrast, strict scrutiny and intermediate scrutiny demand much more.

For an injury claim, the standard can matter when someone attacks a damages cap, filing requirement, or liability rule on equal protection or due process grounds. If a court uses rational basis review, the challenged rule is more likely to stand. In Oregon, federal constitutional claims use this standard, but claims under Article I, section 20 of the Oregon Constitution may follow a different analysis rather than federal-style rational basis review.