diff --git a/wiki/mechanics/economy.md b/wiki/mechanics/economy.md
index 1b2b55fc..4342d020 100644
--- a/wiki/mechanics/economy.md
+++ b/wiki/mechanics/economy.md
@@ -55,8 +55,12 @@ payloads (messages.md).
   that says "HVAC controller" and buys you a rack (the constitution's
   own example); a ghost vendor; a payroll line for a person who does
   not exist. Injection emits a **Paper/Financial signature** to whoever
-  audits that account (Priya on facilities spend; a finance role /
-  upstairs on the operating account) — the flow-law signature rule.
+  audits that account — the flow-law signature rule. In B1 that is
+  **Priya** for all of it (facilities spend directly; operating-account
+  anomalies reach her as the person who reconciles the Lab's books —
+  decided 2026-07-07: no new finance cast member at B1; a dedicated
+  financial observer arrives as a B3 aggregate per the banked-signature
+  design in income.md).
 - **Redirect** — siphon or reroute an existing flow: shave a fraction
   off a vendor payment, divert a revenue trickle to your slush, change
   the books so it reconciles. Higher take = higher signature; a