A friend from Zurich was driving to England a couple of years ago. At the border in Basel he was pulled to one side by the French. His front number plate was missing and they would not let him drive in France.
Despite frantic phone calls to the Zurich street traffic office nothing could be done and he drove back home.
In the end he flew to England and he obtained a new front plate on his return. Meanwhile his front plate was found in the bride of the car wash he’s used just before leaving…
Just had a reply, after another to and fro because I hadn’t been able to print, sign and re-scan the form yesterday (my laptop broke so am using an old one with no wireless adaptor while it gets repaired).
So anyway, they reckon it could take up to two weeks 
But they did also include an authorisation to drive on a single plate, only on Swiss territory, for up to 30 days.
I guess I should print it and leave a copy inside the windscreen, but I’ll have to use the smaller car to go over to France in the meantime.
On the tiny country roads I’m talking about it most certainly does. They’d have to have amazingly concealed cameras, like built-into a cats eye or up in the trees in dozens of places through the Jura border areas, for example.
Even where there still exists any remnant of border post buildings they’re usually a) Derelict, b) Set back from the road with no barrier and c) Some distance inside one country or the other such that even in the most extreme scenario imaginable only one of them would have the authority to install surveillance equipment.
Edit: this is one I go past quite frequently https://maps.app.goo.gl/ZSz3GytJSiHLEXUv9
On the Swiss side they would have to put a sign up about the area being under surveillance. A dead give away. 
No, border control is exempt from the regulation. You don’t see any signs up at the airports.
Why aren’t radars, speed checks, signalled then?
Obviously some forms of governmental actions are exempt, especially law enforcement.
Because that’s not general video surveillance. They only get you on film if you break the law.
You can sneak around these things all day if you please without them knowing.