Compliant IDs must also feature specific security features intended to prevent tampering, counterfeiting, or duplication of the document for fraudulent purposes. The cards must also present data in a common, machine-readable format (bar codes, smart card technology, etc.). Although the use of wireless RFID chips was offered for consideration in the proposed rule making process, it was not included in the latest rule making process. DHS could consider additional technological requirements to be incorporated into licenses after consulting with the states. In addition, DHS has required the use of RFID chips in its Enhanced Driver's License program, which the Department has proposed as an alternative to REAL ID.