Mont. Code Ann. § 32-6-306
Personal identification number -- restrictions
32-6-306 . Personal identification number -- restrictions. (1) A financial institution may not assign a personal identification number to a customer which is identical to that customer's social security account number, driver's license number, or any other number assigned for other purposes to that customer.
(2) A satellite terminal may not be operated so as to print a customer's personal identification number on the humanly readable receipt furnished at the time of a transaction.