diff --git a/schemas/scanbarycentre-README.md b/schemas/scanbarycentre-README.md
index d7b5f01..89c1ce6 100644
--- a/schemas/scanbarycentre-README.md
+++ b/schemas/scanbarycentre-README.md
@@ -30,3 +30,6 @@ in the Developers' documentation.
 #### StarPos
 You MUST add a `StarPos` array containing the system co-ordinates from the
 last `FSDJump`, `CarrierJump`, or `Location` event.
+
+**You MUST apply a location cross-check, as per
+[Other data augmentations](../docs/Developers.md#other-data-augmentations).**