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 f863a31d..eb9df2b8 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
@@ -500,3 +500,18 @@ written; they are cited as "design 39 bus-and-switch B*n*".
`key` beside the §3 fields, as `binding.changed` does (B7); the vault's `licence-bindings` keeps `licence`, `key` and
`generation`, and compares the secret's key with the binding's key. One form travels; the vault never computes §10's
key form (P1, P7).
+- **B26** (the form of `carried.postgres`): `{at, tables: {
: {read, written}}}` (P7).
+- **B27** (the carry-over in the audit log): it appends one `carried` entry, the kind §7 lists (P7).
+- **B28** (an `offered` row older than 90 days): counted as read, not written (P7).
+- **B29** (`adoptedFrom` at the carry-over): the newest `adopted` audit row's `node`, else its `from` (P7).
+- **B30** (when bind and switch say `licence.switched`): only when the consumer moves from another licence (P8).
+- **B31** (an access token asked before the vault's first view of the bindings is answered): refused, saying why (P3).
+- **B32** (a first view of the bindings racing an event heard just before it): a first view never removes or replaces a
+ binding whose generation is newer than the view's; the newer by generation stays (P3).
+- **B33** (what §19's "applied" means): the home holds the token; a home with no token is fetched again at the same
+ generation (P3, ADR 0266).
+- **B34** (a failed usage reading): no `usage` entry is appended; it is said by `readError` and `usage-unread` (P3).
+- **B35** (a reading with no weekly window): its room is unknown, and it is never a target (P3).
+- **B36** (both windows at the threshold): the act names the higher, the session window on a tie (P7).
+- **B37** (a setting outside its bound): it keeps its default and raises `settings..invalid`, cleared when the
+ setting is fixed (P3).