Why don’t you guys apply a little common sense, and step back a pace, so you can look at what an average citizen, legislator, legal counsel or court official will think, not being a radio hobbies or professional?
In court, they will decide what terms mean, and then move forward. The transmit/receive distinction made here is all about what some believe is the key feature, as in can it transmit. U.K. law always had radio tightly controlled’s through to the end of the Cold War, and legally, you did not have to press transmit. Having something in your possession that could transmit was sufficient. I was actually even a witness to one failed arrest. A ham had bought legitimately the same make and model the police used. He was rushed in a shop by an off duty policeman and arrested. I was taken as a potential witness. Unfortunately, I was also a ham. I asked a simple question. Have you tried his radio. They went and got it and tried to call the control room. Nothing. Then they tried to listen to the control room. Their opinion that it was a ‘police’ radio evaporated.
I am certain that even if it only received, they would have prosecuted, as our law back then was that possession of something for which a licence was not available was the crime.
The US stance seems to be that reception is lawful in most states, but not, I understand, in all of them. The term ‘police radio’ might be argued as being any radio that receives the police, not maybe a radio that transmits? Why not test the notion by the judge Judy test. Is that a police radio? Turn it on. Whose voices are those? The police? Tada! It’s a police radio. Legally arguable of course, but the premise is sound.
turn a radio on and boats come out, it’s a marine radio. If it’s airplanes, it’s an aircraft radio. That does seem pretty sensible as an outsider.