diff --git a/csi.proto b/csi.proto
index 9a1a7be8..480e2724 100644
--- a/csi.proto
+++ b/csi.proto
@@ -1112,8 +1112,9 @@ message VolumeHealth {
   // ones, but MUST NOT remove an older error entry from
   // health_statuses until that condition is no longer present.
   //
-  // COs MUST ignore unknown VolumeHealthErrorType values, that they 
-  // don't know about.
+  // The CO MUST NOT infer semantics or take automated action based on
+  // an unknown VolumeHealthErrorType value and MAY report it for 
+  // observability purposes.
   //
   // For example:
   // - CSI spec v1.12.3
diff --git a/lib/go/csi/csi.pb.go b/lib/go/csi/csi.pb.go
index 7150b460..898ff341 100644
--- a/lib/go/csi/csi.pb.go
+++ b/lib/go/csi/csi.pb.go
@@ -2807,8 +2807,9 @@ type VolumeHealth struct {
 	// ones, but MUST NOT remove an older error entry from
 	// health_statuses until that condition is no longer present.
 	//
-	// COs MUST ignore unknown VolumeHealthErrorType values, that they
-	// don't know about.
+	// The CO MUST NOT infer semantics or take automated action based on
+	// an unknown VolumeHealthErrorType value and MAY report it for
+	// observability purposes.
 	//
 	// For example:
 	//   - CSI spec v1.12.3
diff --git a/spec.md b/spec.md
index 879dace6..36fc7e98 100644
--- a/spec.md
+++ b/spec.md
@@ -1762,8 +1762,9 @@ message VolumeHealth {
   // ones, but MUST NOT remove an older error entry from
   // health_statuses until that condition is no longer present.
   //
-  // COs MUST ignore unknown VolumeHealthErrorType values, that they 
-  // don't know about.
+  // The CO MUST NOT infer semantics or take automated action based on
+  // an unknown VolumeHealthErrorType value and MAY report it for 
+  // observability purposes.
   //
   // For example:
   // - CSI spec v1.12.3