Final answer:
The minimum age to get a probationary driver license is generally around 16 years old in the United States, though it can vary by state and is distinct from the minimum drinking age set by the National Minimum Drinking Age Act of 1984.
Step-by-step explanation:
The minimum age to obtain a probationary driver license varies by state in the United States, and this question seems to conflate the issue of driver licensing with the National Minimum Drinking Age Act of 1984. The act requires states to set their minimum drinking age at twenty-one or risk forfeiting a portion of federal highway funds.
However, the minimum age for a probationary driver license is typically around 16 years old in most states, separate from drinking age laws. Each state sets its own requirements, and learners' permits can sometimes be obtained at a younger age, usually around 15 or 15 and a half years old.