diff --git a/extensions/2.0/Khronos/KHR_materials_clearcoat/README.md b/extensions/2.0/Khronos/KHR_materials_clearcoat/README.md
index ff9fc85a78..1f6ae705fb 100644
--- a/extensions/2.0/Khronos/KHR_materials_clearcoat/README.md
+++ b/extensions/2.0/Khronos/KHR_materials_clearcoat/README.md
@@ -21,8 +21,10 @@ Written against the glTF 2.0 spec.
 
 ## Exclusions
 
-* This extension must not be used on a material that also uses `KHR_materials_pbrSpecularGlossiness`.
-* This extension must not be used on a material that also uses `KHR_materials_unlit`.
+This extension must not be used on a material that also uses any of the following extensions:
+
+- `KHR_materials_pbrSpecularGlossiness`
+- `KHR_materials_unlit`
 
 ## Overview
 
diff --git a/extensions/2.0/Khronos/KHR_materials_pbrSpecularGlossiness/README.md b/extensions/2.0/Khronos/KHR_materials_pbrSpecularGlossiness/README.md
index a2d35d4c7d..490fd0da96 100644
--- a/extensions/2.0/Khronos/KHR_materials_pbrSpecularGlossiness/README.md
+++ b/extensions/2.0/Khronos/KHR_materials_pbrSpecularGlossiness/README.md
@@ -1,6 +1,7 @@
 # KHR\_materials\_pbrSpecularGlossiness
 
-## Khronos 3D Formats Working Group
+## Contributors
+
 * Saurabh Bhatia, Microsoft [@iamsbtron](https://twitter.com/iamsbtron)
 * Gary Hsu, Microsoft [@bghgary](https://twitter.com/bghgary)
 * Patrick Cozzi, Cesium, [@pjcozzi](https://twitter.com/pjcozzi)
@@ -22,6 +23,13 @@ Complete
 
 Written against the glTF 2.0 spec.
 
+## Exclusions
+
+This extension must not be used on a material that also uses any of the following extensions:
+
+- `KHR_materials_clearcoat`
+- `KHR_materials_unlit`
+
 ## Overview
 
 This extension defines the specular-glossiness material model from Physically-Based Rendering (PBR). This extensions allows glTF to support this additional workflow. 
diff --git a/extensions/2.0/Khronos/KHR_materials_unlit/README.md b/extensions/2.0/Khronos/KHR_materials_unlit/README.md
index 2d037e0172..6ba2b385ad 100644
--- a/extensions/2.0/Khronos/KHR_materials_unlit/README.md
+++ b/extensions/2.0/Khronos/KHR_materials_unlit/README.md
@@ -18,6 +18,13 @@ Complete
 
 Written against the glTF 2.0 spec.
 
+## Exclusions
+
+This extension must not be used on a material that also uses any of the following extensions:
+
+- `KHR_materials_clearcoat`
+- `KHR_materials_pbrSpecularGlossiness`
+
 ## Overview
 
 This extension defines an unlit shading model for use in glTF 2.0