Amends GS 20-16.2(c1) to provide that when a person has an alcohol concentration of 0.13 (was, 0.15) or more, the law enforcement officer and the chemical analyst must execute an affidavit stating the specified information. Makes technical changes.

Amends GS 20-17.8 to require the use of an ignition interlock system when restoring the license of a person who had an alcohol concentration of 0.13 (was, 0.15) or more. Adds the requirement that the Division of Motor Vehicles revoke the drivers license of a person subject to the statute if an ignition interlock system is disabled or removed. Makes conforming and technical changes. 

Amends GS 20-179.3, concerning limited driving privilege, as follows. Requires that a limited driving privilege issued to a person convicted of an impaired driving offense with an alcohol concentration of 0.13 (was, 0.15) or more include the specified provisions; removes from those provisions the requirement that the privilege not become effective until at least 45 days after the final conviction. Amends the definition of standard working hours to include Saturday and Sunday. Makes conforming, clarifying, and technical changes.

Effective December 1, 2015, and applies to offenses committed on or after that date and restorations for offenses committed on or after that date. Provides that prosecutions for offenses committed before the act's effective date are not abated or affected.