I will always chime in with factual data when someone like yourself *believes* something and tries to present it as fact. Yes, I know how every situation has played out. It has never happened and will never happen. Like I said earlier, you have return rights if the facility is less then 100% projected staffing, which happens frequently. In your hypothetical example, that is the only way someone can go from a CPC at a Level 11 stand alone tower, transfer to a 9 up/down, wash, and return to a level 11 tower. Return rights. Here are actual examples when you remove return rights when people changed specialties.
CPC 12, Wash 12, NEST 8
CPC 12, Wash 10, NEST 7
CPC 11, Wash 11, NEST 4
CPC 12, Wash 6, NEST 5
CPC 12, Wash 6, NEST 6
CPC 12, Wash 12, NEST 7
With every situation, there is someone on here that can respond with absolute certainty. If you can't and still want to present your belief as fact to mislead others, that's what stuckmic is for.