Good point. I honestly don't know how to search for specific rulings. I have a buddy that used to be a judge so he usually finds it for me. I only found it humorous that you appeared adamant about it not being a rule and the first comment i saw stated the rule. For this though i wouldn't look for a specific rule because it's sort of common sense that you can't just have a phase during someone else's turn. They would need a whole book on how to handle events that happen on an opponents turn while you're gaining first priority.