diff --git a/03-DESIGN/01-to-be/39-milestones/bus-and-switch.md b/03-DESIGN/01-to-be/39-milestones/bus-and-switch.md
index 4ab7625d..036639df 100644
--- a/03-DESIGN/01-to-be/39-milestones/bus-and-switch.md
+++ b/03-DESIGN/01-to-be/39-milestones/bus-and-switch.md
@@ -553,3 +553,7 @@ written; they are cited as "design 39 bus-and-switch B*n*".
   `sessionPct` empty, so neither had room and the switch could choose no target): a licence's room is 100 less its
   weekly percentage alone; the session window takes no part in room, the switch threshold, the warning or the
   conditions, wherever §24 to §33 name it. A reading with no weekly percentage still has unknown room (B35).
+- **C5** (met live 2026-11-12: `licences_switches` answered every switch carried from the old database with no `to` and
+  no `consumers`): a carried entry keeps the old manager's fields as §12 copies them, a switch written as its
+  `consumer`, its `licence` and `from`; §37's reader answers such an entry with `to` its `licence` and `consumers` the
+  one `consumer`, and its filters by licence and consumer read it the same way. The log is not rewritten (P2, P3).