For children below 5 years old, UIDAI does not require biometrics. The UID for these children will be processed based on their facial photograph and demographic details that is linked with the UID of their parents. Once these children turn 5 years old, they have to be re-enrolled. During this re-enrollment process, their biometrics will be collected by UIDAI. Their biometrics will be updated again when they turn 15 years old.