I also think it's best to wait for the official document. There are many ways to restrict Old B, such as setting a time limit for him. For example, "Old B, you have [duration]..."YearFrom [Date] onwards, we will no longer approve the installation of devices with an output power of 15W or more up to 100W for Old B. For those that have already been approved, applications for extension remain valid. We will then gradually phase out these devices...