Maybe you mean first-aid kit, which is compulsory in probably all Europe countries? I assume disaster bag is larger survival kit, with some water, dry food, flashlight, etc.
where I live, if I kept a disaster bag in my car my window would be broken and it would be stolen
it's not necessary to keep it in your car. the point is to keep it in a bag, which you could quickly bring to your car or even carry with you.
You mean you have such a requirement in Germany? I'm intrigued. Tell me more please.
Or where you talking about what would happen if such a mandate existed?
https://www.ramstein.af.mil/News/Article-Display/Article/293...
It's a first aid kit, as well as accident signaling cones and reflective vest.
They could easily update it with a simple AM transceiver if AM radios in cars become uncommon.
In Germany, the inspector would fail you pretty quickly. Consequently compliance is very high, and somehow not very expensive.