I think the language refers to electric toys as someone mentioned. "PMV" as in Personal Mobility Vehicle is the term most often used for scooters and wheelchairs in my experience.

Where I've seen regulations against PMVs has only been in places like some national parks' higher-risk, pedestrian-only trails, but those restrictions are safety related, not in place as a matter of controlling traffic. (Ask Craig! )

It seems to me that 1967 was about when the Solex came out, it was an electric and/or gas motor that originally attached to a bicycle and allowed the rider speeds of about 15 mph. The electric ones were "charged up" by pedaling the bike. In my area, they were restricted pretty much everywhere but residential streets.

Any government agency that applied this ordinance to the users of legitimate PMVs would be subjected to a tirade of very unfortunate legal issues.

Ride the like the wind, Sassy! Dare them to even approach you on this one!!