diff --git a/src/schema/provenance_schema.yaml b/src/schema/provenance_schema.yaml
index dbb3351b..f88898ef 100644
--- a/src/schema/provenance_schema.yaml
+++ b/src/schema/provenance_schema.yaml
@@ -1026,6 +1026,10 @@ ENTITIES:
         type: json_string
         indexed: true
         description: "The sample location and orientation in the ancestor organ as specified in the RUI tool."
+      rui_exemption:
+        type: boolean
+        indexed: true
+        description: "Identifies Sample Blocks that are exempt from spatial registration via RUI."
       visit:
         type: string
         indexed: true