F.1:9.1 - Changes that reopen or revise a cut

1. A source edition changes a relied claim, limit, or distinction.
2. The receiving question or intended use changes.
3. A new rival explanation, action-changing counterexample, or transfer limit appears.
4. A formerly retained source no longer changes the answer.
5. A language edition changes distinctions used by the result; treat editions separately unless the source supplies a mapping that preserves them.
6. Search-policy drift reveals a candidate but never changes membership without source inspection.
7. A later F.9 relation is proposed; keep source selection unchanged unless that proposal changes the source roles themselves.