On paper you can get it when you have worked and paid taxes for 3 years.
After 25 years I still don't have it as they (immigration) make their own rules up along the way.
Married, adult children (now) , company, work permit etc etc.
Don't mention it to much over here because experts (selfmade) will tell you that you don't know a thing.
Ubonjoe is the only person I would trust on this.