The Juvenile Justice and Delinquency Prevention Act of 1974 (JJDPA) is the central federal law that establishes core requirements for state juvenile justice systems. 34 USC §111. In return for compliance with these core requirements, the statute authorizes federal funding for states to use in their juvenile justice systems. The JJDPA expired in 2007 and was recently reauthorized in the Juvenile Justice Reform Act of 2018. Public Law No 115-385. The reauthorized statute made several significant amendments to the JJDPA. In this blog post I will discuss three of the highlights: a new focus on evidence-based and promising programs and practices, changes in the disproportionate minority contact core requirement, and new requirements regarding identification and treatment of mental health and substance use disorders.