6 CFR § 37.19 - Machine readable technology on the driver's license or identification card.
For the machine readable portion of the REAL ID driver's license or identification card, States must use the ISO/IEC 15438:2006(E) Information Technology - Automatic identification and data capture techniques - PDF417 symbology specification. The Director of the Federal Register approves this incorporation by reference in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. You may obtain a copy of these incorporated standards at http://www.ansi.org, or by contacting ANSI at ANSI, 25 West 43rd Street, 4th Floor, New York, New York 10036. You may inspect a copy of the incorporated standard at the Department of Homeland Security, 1621 Kent Street, 9th Floor, Rosslyn, VA (please call 703-235-0709 to make an appointment) or at the National Archives and Records Administration (NARA). For information on the availability of material at NARA, call 202-741-6030, or go to http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html. The PDF417 bar code standard must have the following defined minimum data elements:
(a) Expiration date.
(c) Date of transaction.
(d) Date of birth.
(i) Inventory control number of the physical document.
(j) State or territory of issuance.