diff --git a/copyleft_license.rego b/copyleft_license.rego
new file mode 100644
index 0000000..8da3d34
--- /dev/null
+++ b/copyleft_license.rego
@@ -0,0 +1,14 @@
+# METADATA
+# title: Copyleft license
+# description: |
+#    Block packages that have a copyleft license
+package policy.v1
+
+import rego.v1
+
+# METADATA
+# title: Copyleft license
+deny contains issue if {
+	some issue in data.issues
+	issue.tag == "IL0050"
+}