diff --git a/Client-Side Components/Client Scripts/Require comment onPriority change/README.md b/Client-Side Components/Client Scripts/Require comment onPriority change/README.md
new file mode 100644
index 0000000000..bcc58a3054
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+++ b/Client-Side Components/Client Scripts/Require comment onPriority change/README.md	
@@ -0,0 +1,6 @@
+Table: sn_customerservice_case
+Type: OnChange
+Field: Priority
+
+Use Case:
+Make additional comments mandatory on priority change for the case table.
diff --git a/Client-Side Components/Client Scripts/Require comment onPriority change/script.js b/Client-Side Components/Client Scripts/Require comment onPriority change/script.js
new file mode 100644
index 0000000000..29aece0c53
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+++ b/Client-Side Components/Client Scripts/Require comment onPriority change/script.js	
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+function onChange(control, oldValue, newValue, isLoading, isTemplate) {
+    if (isLoading || newValue === '') {
+        return;
+    }
+    if ((!g_form.isNewRecord()) && (newValue != oldValue)) {
+        g_form.setMandatory('comments', true);
+        g_form.addErrorMessage('Additional comment required when changing Priority.');
+    } else {
+        g_form.setMandatory('comments', false);
+    }