What feature distinguishes a driver's license for those under 21 years from those over 21?

The distinguishing feature of a driver's license for individuals under 21 years of age is its vertical orientation. This design choice is intended to clearly indicate that the holder is not of legal drinking age, which is an important consideration in various contexts, such as when verifying age for alcohol purchases or entry into age-restricted venues.

The use of vertical orientation helps law enforcement and businesses make quick visual assessments regarding the age of the licensee. Such a feature creates a uniform standard across states, making it easier for establishments to identify and comply with age-related regulations.

While color, size, and material may vary by state or jurisdiction, the vertical orientation consistently serves as a clear and immediate indicator of a person’s age-related status in relation to driving privileges and legal age requirements.