diff --git a/03-DESIGN/01-to-be/47-milestones/G-20-lead-answers.md b/03-DESIGN/01-to-be/47-milestones/G-20-lead-answers.md
index 7a433095..70a9820b 100644
--- a/03-DESIGN/01-to-be/47-milestones/G-20-lead-answers.md
+++ b/03-DESIGN/01-to-be/47-milestones/G-20-lead-answers.md
@@ -482,3 +482,7 @@ names the principle that settles it, and is cited as "design 47 G A-n".
 - **A-120** (A-117, A-95; principles 2 and 7) The early pass takes the node's own record from the statement the
   node-engine makes of itself (its tunnel key, sealing key and capabilities), held in memory and built before the
   composer's watch starts, without the bus; no copy of the record is kept in the composition state.
+- **A-121** (§554; principles 7 and 8) An old section's kept data is named as the bus composer of mesh-sdk names it
+  when it makes it: a state `KV_` and its bucket name (module and name joined by `_`), a log its log stream name
+  (`LOG_`, module, `_`, name), a stream its declared name as is, an objects section `OBJ_` and module and name joined
+  by `_`. The recovery module calls those mesh-sdk names; it writes no name of its own.