If a driver under 18 years of age is convicted of ____ moving violations within a year, his or her provisional license may be suspended for 90 days.

If a driver under 18 years of age is convicted of three moving violations within a twelve-month period, his or her provisional license may be suspended for 90 days. [Provisional Licensee (under age 18); Suspensions; Chapter 3 – Your Driving Privilege, North Carolina Driver's Handbook]