diff --git a/src/xrpld/app/consensus/ConsensusExtensions.cpp b/src/xrpld/app/consensus/ConsensusExtensions.cpp
index fdbffae94..4812962ad 100644
--- a/src/xrpld/app/consensus/ConsensusExtensions.cpp
+++ b/src/xrpld/app/consensus/ConsensusExtensions.cpp
@@ -260,10 +260,11 @@ ConsensusExtensions::entropyGateThreshold() const
     // entropy conflict gate resolves: the lowest ENABLED accepted tier's
     // threshold. In the normal band tier2Threshold (~0.6*original) < quorum
     // (0.8*effective), so this is the participant-alignment floor and
-    // sub-quorum rounds reach injection; under heavy nUNL the band collapses
-    // (tier2 >= quorum) and this is the 80% quorum, so only validator_quorum
-    // survives. This governs proceed-vs-fall-back only. Non-fallback tier
-    // labels are allowed only when the round view is anchored by UNLReport; the
+    // sub-quorum rounds reach injection. Under nUNL the exact integer
+    // thresholds can cross either way; that only changes which threshold lets
+    // the pipeline proceed. Final tier labels are computed later from the
+    // agreed entropy set count in selectEntropy(). Non-fallback tier labels are
+    // allowed only when the round view is anchored by UNLReport; the
     // trusted-fallback view is local configuration and selectEntropy() maps it
     // to consensus_fallback.
     return std::min(quorumThreshold(), tier2Threshold());
diff --git a/src/xrpld/app/consensus/ConsensusExtensionsDesign.md b/src/xrpld/app/consensus/ConsensusExtensionsDesign.md
index 1f70644d6..e1ff1c798 100644
--- a/src/xrpld/app/consensus/ConsensusExtensionsDesign.md
+++ b/src/xrpld/app/consensus/ConsensusExtensionsDesign.md
@@ -203,6 +203,12 @@ set is labeled `validator_quorum`; if it is below `quorumThreshold()` but reache
 back. `quorumThreshold()` is 80% of the effective active view; `tier2Threshold()`
 is the intersection-safe floor over the original pre-nUNL view.
 
+Under nUNL, exact integer thresholds can cross either way. For example, a
+20-validator original view with five disabled validators has effective quorum
+12 but participant threshold 13. That only changes which threshold dominates
+the proceed gate; the final tier label is still derived from the agreed entropy
+set count by the ladder above.
+
 In both label cases, a below-threshold minority can advertise a conflicting or
 unacquirable entropy hash without vetoing the aligned cohort.