Amends GS 18B-302.1 (Penalties for certain offenses related to underage persons) by adding new subsection (b1) to establish that a violation of GS 18B-302 subsections (a) (unlawful to sell alcohol to anyone under 21), (a1) (unlawful to give alcohol to anyone under 21), or (c)(2) (unlawful for any person over lawful age to aid and abet any person under 21 to sell, give, purchase, possess or consume alcohol) is a Class I felony if the commission of the offense is the proximate cause of the death of a person. Makes conforming changes to GS 18B-302.1(a) and (b). Effective December 1, 2017, and applies to offenses committed on or after that date.