Hi Anon,
Sorry anon but you are wrong. I'm a professional teacher of the English style and the Passing Changes, plus the Change Steps, were in my Associate syllabus 47 years ago when I joined the then International Dance Masters' Association, UK. (IDMA). Also the Outside Change can commence in line (ISTD) or ouside partner (IDTA) I use to contribute regularly to this message board but it was becoming almost a full-time job in answering queries such as yours. So I stopped. What I wrote is the answer. It's as simple as that! I'll say no more on this.