What I meant by the rules of changing status is when I am able to change her status of accompanying vs non-accompanying as well as if the process would have to be started completely over for her and therefore her be the primary on a new app vs them just adding her to mine at some point.
Again, read each response already provided. As I stated in a previous post, she can be changed to accompanying up until you land as a PR or you can land and then sponsor her.