#
# Please ensure that your POS terminals, websites and any pertinent
# internal systems can accept these new IINs.
-
+#
+# from http://en.wikipedia.org/wiki/Laser_(debit_card)#Technical
+# Laser cards are prefixed with either "6304", "6706", "6771" or "6709", and
+# may be between 16 and 19 characters in length.