diff --git a/bptc19696.py b/bptc19696.py
old mode 100644
new mode 100755
index f5687f9..c333f69
--- a/bptc19696.py
+++ b/bptc19696.py
@@ -1,3 +1,11 @@
+#!/usr/bin/env python
+#
+# This work is licensed under the Creative Attribution-NonCommercial-ShareAlike
+# 3.0 Unported License.To view a copy of this license, visit
+# http://creativecommons.org/licenses/by-nc-sa/3.0/ or send a letter to
+# Creative Commons, 444 Castro Street, Suite 900, Mountain View,
+# California, 94041, USA.
+
 from __future__ import print_function
 
 from bitstring import BitArray
diff --git a/hb_config.py b/hb_config.py
old mode 100644
new mode 100755
index 92c431e..36dfdd0
--- a/hb_config.py
+++ b/hb_config.py
@@ -1,3 +1,11 @@
+#!/usr/bin/env python
+#
+# This work is licensed under the Creative Attribution-NonCommercial-ShareAlike
+# 3.0 Unported License.To view a copy of this license, visit
+# http://creativecommons.org/licenses/by-nc-sa/3.0/ or send a letter to
+# Creative Commons, 444 Castro Street, Suite 900, Mountain View,
+# California, 94041, USA.
+
 import ConfigParser
 import sys
 
diff --git a/hb_log.py b/hb_log.py
old mode 100644
new mode 100755
index 9bd2c6b..ed6d8a2
--- a/hb_log.py
+++ b/hb_log.py
@@ -1,3 +1,11 @@
+#!/usr/bin/env python
+#
+# This work is licensed under the Creative Attribution-NonCommercial-ShareAlike
+# 3.0 Unported License.To view a copy of this license, visit
+# http://creativecommons.org/licenses/by-nc-sa/3.0/ or send a letter to
+# Creative Commons, 444 Castro Street, Suite 900, Mountain View,
+# California, 94041, USA.
+
 import logging
 from logging.config import dictConfig