You can change the address of your society's registered office at any time. The society's rules and some other conditions apply to this change. You must tell the Registrar about the change in a specific way. You can choose when the change happens, but it must be at least 5 working days after you tell the Registrar. The Registrar is the person who keeps track of this information. You can find more information about this by looking at the relevant law. The society's committee makes the decision to change the address. They can do this whenever they want, as long as they follow the rules. The change is official after you tell the Registrar and wait the required amount of time.