(1) The rules in this subchapter apply to all vehicles and motor vehicles, as defined in 61-1-101, MCA, including, but not limited to, motorcycles, snowmobiles, off-highway vehicles, trailers, and motor homes, collectively referred to herein as "motor vehicles."

(2) The following are prohibited in state parks:

(a) operating a motor vehicle in violation of posted traffic rules, including but not limited to, speed limits, yield or stop signs, and directional signage;

(b) driving off authorized roadways, except onto designated parking areas; and

(c) driving on any road, trail, or area which is specifically posted against such use.

(3) No person shall operate any off-highway vehicle in a state park on designated trails in violation of the registration and operating regulations in Title 23, chapter 2, part 8, MCA.

(4) Operating a snowmobile in a state park, except in designated areas, is prohibited.