Automatically, but many if not most commercial regulations get incorporated, in this case the warranty legislation also dictates 2 years
> than for something like Brexit I would say the difference lies more in the renegotiation than in the cutting. EU membership doesn't get renegotiated often, while treaties between EU/CH are expected to be renegotiated (although that has a whole host of challenges and doesn't happen nearly as often as you'd expect)
But nullification is a similar impact and a similar process as brexit because most of these negotiations had a guillotine clause which tied them toghether
Brexit was a remarkably straightforward process, you send a letter and at the latest two years later you're out if you don't ask for exception
It was the headless chicken phase when the UK was trying to negotiate without having an internal consensus on what they wanted that was convoluted