United States v. Juvenile Male, 470 F.3d 939 (9th Cir. Dec. 14, 2006) (Federal Juvenile Delinquency Act applies to a juvenile's re-sentencing after revocation of probation, as well as the initial sentencing, so district court committed plain error by re-sentencing the juvenile under the adult sentencing scheme).
http://caselaw.lp.findlaw.com/data2/circs/9th/0630270p.pdf