The plastic card shows the owners full name, maiden name if applicable, birth date and place, mother's maiden name, the cardholder's gender, the ID's validity period and the local state authority which issued the card. The card has a 6 digit number + 2 letter unique ID and a separate machine readable zone on the back for identity document scanning devices. It does not have any information about the owner's residential address, nor their personal identity number – this sensitive information is contained on a separate card, called a Residency Card ("Lakcímkártya"). Personal identity numbers have been issued since 1975; they have the following format in numbers: gender (1 number) – birth date (6 numbers) – unique ID (4 numbers). They are no longer used as a personal identification number, but as a statistical signature.