There are multiple ways to achieve this:

• You can create separate commands and update all part individually without using single update method.
• You can check if info is changes for specific argument and fire event if is changed.

My preference is to have more granular events for more control and I will probably not fire the general "AddPersonUpdatedDomainEvent" event, but as I say that may vary from application to application.

In summary I think there is strict rules how to do this, but it may depend of application needs.