diff --git a/src/python/detectors/notebook_best_practice_violation/notebook_best_practice_violation.py b/src/python/detectors/notebook_best_practice_violation/notebook_best_practice_violation.py
new file mode 100644
index 0000000..ac4f201
--- /dev/null
+++ b/src/python/detectors/notebook_best_practice_violation/notebook_best_practice_violation.py
@@ -0,0 +1,82 @@
+#  Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+#  SPDX-License-Identifier: Apache-2.0
+
+# {fact rule=notebook-best-practice-violation@v1.0 defects=1}
+# —— Code Cell 1 —— #
+import numpy as np
+# —— Code Cell 2 —— #
+# Noncompliant: imports are not in the first code cell.
+import pandas as pd
+primary = pd.read_csv('attribute-primary-info.csv', sep='\t')
+primary
+# —— Code Cell 3 —— #
+alias = pd.read_csv('attribute-alias-info-en_US.csv', sep='\t')
+alias
+# —— Code Cell 4 —— #
+# Noncompliant: blank cells.
+# —— Code Cell 5 —— #
+
+# —— Code Cell 6 —— #
+
+# —— Code Cell 7 —— #
+
+# —— Code Cell 8 —— #
+
+# —— Code Cell 9 —— #
+print('Hello World!')
+# —— Code Cell 10 —— #
+print('Hello World!')
+# —— Code Cell 11 —— #
+print('Hello World!')
+# —— Code Cell 12 —— #
+print('Hello World!')
+# —— Code Cell 13 —— #
+print('Hello World!')
+# —— Code Cell 14 —— #
+print('Hello World!')
+# —— Code Cell 15 —— #
+print('Hello World!')
+# —— Code Cell 16 —— #
+print('Hello World!')
+# —— Code Cell 17 —— #
+print('Hello World!')
+# —— Code Cell 18 —— #
+print('Hello World!')
+# —— Code Cell 19 —— #
+print('Hello World!')
+# —— Code Cell 20 —— #
+print('Hello World!')
+# —— Code Cell 21 —— #
+print('Hello World!')
+# —— Code Cell 22 —— #
+print('Hello World!')
+# —— Code Cell 23 —— #
+print('Hello World!')
+# —— Code Cell 24 —— #
+print('Hello World!')
+# —— Code Cell 25 —— #
+print('Hello World!')
+# —— Code Cell 26 —— #
+print('Hello World!')
+# —— Code Cell 27 —— #
+# Noncompliant: too many code cells.
+print('Hello World!')
+# —— Code Cell 28 —— #
+# —— Code Cell 29 —— #
+# —— Code Cell 30 —— #
+# {/fact}
+
+
+# {fact rule=notebook-best-practice-violation@v1.0 defects=0}
+# —— Code Cell 1 —— #
+# Compliant: cell is not blank. Imports are in place.
+# Cell limit is not exceeding.
+import numpy as np
+import pandas as pd
+# —— Code Cell 2 —— #
+primary = pd.read_csv('attribute-primary-info.csv', sep='\t')
+primary
+# —— Code Cell 3 —— #
+alias = pd.read_csv('attribute-alias-info-en_US.csv', sep='\t')
+alias
+# {/fact}