; or (B) about which a study is being conducted to determine if such practice is evidence-based. (7) Youth The term youth means— (A) an individual who is 18 years of age or younger; or (B) in any State in which the maximum age at which the juvenile justice system of such State has jurisdiction over individuals exceeds 18 years of age, an individual who is such maximum age or younger. . II AMENDMENTS TO THE OFFICE OF JUVENILE JUSTICE AND DELINQUENCY PREVENTION 201. Definition of community-based gang intervention Section 103 of the Juvenile Justice and Delinquency Prevention Act of 1974 ( 42 U.S.C. 5603 ) is amended— (1) in paragraph (1), by inserting except when used in title VI, before the term ; (2) in paragraph (28), by striking and after the semicolon; (3) in paragraph (29), by striking the period at the end and inserting ; and ; and (4) by adding at the end the following new paragraph: (30) except when used as part of the term community-based gang intervention agency or community-based gang intervention model , the term community-based gang intervention means a two-prong approach to reducing gang violence that— (A) provides specialized, gang-specific mediation and mitigation to stop or prevent violence by, within, and between gangs; and (B) provides the redirection of individual gang members and their families through proactive efforts that increase peace and safety for gang members, their families, and their communities. . 202. Community-based gang intervention representative to State advisory boards Section 223(a)(3)(ii) of the Juvenile Justice and Delinquency Prevention Act of 1974 ( 42 U.S.C. 5633(a)(3)(ii) ) is amended— (1) in subclause (III), by inserting , or community-based gang intervention after delinquency prevention or treatment