(1) ORS 818.300 does not apply on any way, thoroughfare or place owned by a district formed under ORS chapters 545, 547, 551 or a corporation formed under ORS chapter 554.
(2) ORS 818.300 does not apply on any road or thoroughfare or property in private ownership or any road or thoroughfare, other than a state highway or county road, used pursuant to any agreement with any agency of the United States or with a licensee of such agency or both.
(3) Operations authorized under the terms of a permit issued under ORS 818.230 are subject to the terms of the permit. It is a defense to any charge of violation of ORS 818.300 if the person so charged produces a permit issued under ORS 818.230 authorizing the operation of the vehicle or combination of vehicles issued prior to and valid at the time of the offense. [1983 c.338 §525; 1985 c.16 §270; 1987 c.158 §173]