Other than being intact and current, what other features must an ID have in order to be valid?

A valid ID must have the following features:
- Birth date: The ID must show the person's date of birth. This is important for verifying that the person is of legal age to engage in certain activities, such as purchasing alcohol or voting.
- Photo: The ID must have a photo of the person. This is important for verifying the identity of the person.
- Signature: The ID must have the person's signature. This is important for verifying that the person is who they say they are.