When a person is convicted of driving while impaired under G.S. 20-138.1, the person’s license is revoked for one year. G.S. 20-17(a)(2); G.S. 20-19(c1). (A person who has one or more prior convictions for an offense involving impaired driving may be subject to a longer period of revocation, depending on when those offenses occurred.) At the conclusion of that one-year revocation period, the person may seek to have his or her license restored by furnishing proof of financial responsibility and by paying a restoration fee of $140.25. G.S. 20-7(c1), (i1). The license then may be restored with a restriction prohibiting the person from operating a vehicle with an alcohol concentration of 0.04 or more at any relevant time after the driving. G.S. 20-19(c3). That restriction, listed on the driver’s license as Restriction 19, remains in effect for three years. This post addresses how such a restriction is enforced and the consequences for a substantiated violation.