Or. Rev. Stat. § 814.290
This section establishes exemptions from the requirements and penalties relating to the use of motorcycle helmets under ORS 814.260 to 814.280. A person is not in violation of ORS 814.260, 814.269, 814.275 or 814.280 if the person is any of the following:
[1983 c.338 §693; 1987 c.910 §6; 1995 c.492 §7]