At the community meeting it was described as a ban on all e-bikes, anything with a motor.
And that is exactly how the PDF you posted reads. But as you can see in the email below, it is not that cut and dry. This is why I think there will be some confused interactions in the future. Which inherently shines a light onto all of us so it is in our own best interest not to be a-holes, bikes or e bikes. Here is the message I received.
"Hi,
Motorized vehicles, such as gas-powered bikes or ebikes assisting to attain speeds greater than 20 mph, or any scooters or motorcycles are not allowed on our trails.
According to Arizona Law, Class one and two ebikes, those with a maximum assist speed of 20 mph, are classified as bicycles and are allowed on roads and trails where bicycles are allowed. Therefore, these are currently allowed on the multiuse trails in our desert preserves.
State law does allow land managers to post signage prohibiting ebikes from trails, and if the City’s Parks and Recreation Board decides that is the direction our parks and preserves needs to go, then we will do that, so please watch for signage. Individual parks are not allowed to make autonomous decisions regarding policy.
Please be sure to stay on the trail, and follow all park rules, such as bicycles yield to everyone.
Hope this helps.
Thank you,"