Design/Frames.md

@@ -34,4 +34,5 @@ Hence the following is true:
 * Changes received already marked as *foreign* are fixed as non-changes (not to be forwarded)
 * Receive state must maintain list of *foreign* changes, moved to new frames.
 * Received *foreign* changes become fixed once new frame constructed that takes those changes
+* a local change to a *foreign* change removes the *foreign* flag