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 3de391f7..1b77b45c 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
@@ -530,3 +530,5 @@ written; they are cited as "design 39 bus-and-switch B*n*".
 - **B42** (which first view `vault_first_view_again` asks again): a new argument `of` names the view by its owner's
   state (`mesh-delivery-assigner.assignments` or `claude-licence-manager.bindings`); absent, both are asked again, as
   the tool did before for its one view (P4).
+- **B43** (B32 for a consumer absent from the first view): a `licence-bindings` key written by an event after the first
+  view was asked is kept; only a key written before it was asked, and absent from the view, is removed (P3).