Its the same here in BC. Curious though, with such specific wording, or perhaps not specific enough, regarding the restriction of "motorized vehicles" on our park paths I wonder if quads and paras in electric wheelchairs are potentially subject to these ridiculous and myopic rules? Having worked in a spinal cord rehabilitation hospital the last fifteen years I can tell you that the newest generation of electric wheelchairs can be set to move pretty damned fast. Consider that its a couple hundred pounds for the chair alone and you can imagine the damage they could do to park users (think of the CHILDREN!!!!).
Maybe we should enforce a ban on electric wheelchairs and "Jerry" scooters (y'know, scamps or whatever the auld folks in Nevada are riding around on)?

Of course were one to take it that far then the next logical step would probably be to ban parks staff from using motorized vehicles to perform maintenance work. It would be an excellent act of good faith on their part.