A couple of discussion questions:
1. May I carry on my person (such as in my pocket) a portable scanner, and listen to it, if I'm a passenger in a cab?
2. May I carry on my person, and listen to, a portable scanner in my private vehicle?
Neither vehicle has been "equipped".
3. Does anything change if the scanner goes from my pocket to the seat beside me?
"A person, not a police officer or peace officer, acting pursuant to his special duties, who equips a motor vehicle with a radio receiving set......"
If I carry a Pro-106, the car isn't equipped; I am. If the law was written in a way that didn't foresee the eventuality of a hand-held, police band-capable radio, then there's your loophole.