Final Answer:
The DMV issues a "vertical" license to applicants under the age of 21.
Step-by-step explanation:
Vertical License: The correct term to fill in the blank is vertical license. In many jurisdictions, the DMV (Department of Motor Vehicles) issues a vertical-format driver's license to individuals who are under the age of 21. This distinctive format makes it easy for businesses and authorities to identify individuals who are not yet of legal drinking age.
Issued to Applicants Under 21: The phrase applicants under the age of 21 specifies the target demographic for the vertical license. It serves as an age identifier and indicates that the person holding such a license is not of legal drinking age.