(1) Except as otherwise provided in this section, section 4.889, ORS 166.260, 166.270, 166.274, 166.280, 166.291, 166.292 or 166.410 to 166.470, a person commits the crime of unlawful possession of a firearm if the person knowingly:
(b) Possesses a handgun that is concealed and readily accessible to the person within any vehicle; or
(c) Possesses a firearm and:
1. Is under 18 years of age;
2. Has been convicted of a felony or found guilty, except for insanity under ORS 161.295, of a felony;
3. Was committed to the Mental Health and Development Disability Services Division under ORS 426.130 within four years prior to January 1, 1990; or
4. Was found to be mentally ill and subject to an order under ORS 426.130 that the person be prohibited from purchasing or possessing a firearm as a result of that mental illness.
(2) This section does not prohibit:
(a) A minor, who is not otherwise prohibited under subsection (1)(c) of this section, from possessing a firearm:
1. Other than a handgun, if the firearm was transferred to the minor by the minor’s parent or guardian or by another person with the consent of the minor’s parent or guardian; or
2. Temporarily for hunting, target practice or any other lawful purpose; or
(b) Any citizen of the United States over the age of 18 years who resides in or is temporarily sojourning within this state, and who is not within the excepted classes prescribed by ORS 166.270 and subsection (1) of this section, from owning, possessing or keeping within the person’s place of residence or place of business any handgun, and no permit or license to purchase, own, possess or keep any such firearm at the person’s place of residence or place of business is required of any such citizen. As used in this subsection, “residence” includes a recreational vessel or recreational vehicle while used, for whatever period of time, as residential quarters.
(3) Firearms carried openly in belt holsters are not concealed within the meaning of this section.