California is on the verge of a monumental shift to its justice system. Removing wealth as the determinant of who is detained pretrial and who is not has the potential to positively influence community safety, individual liberty, and racial equity. However, as with any wide-ranging state policy reform, the ultimate impact will be determined by how the law is implemented at the local level. Probation chiefs are positioned to shape thefuture of pretrial justice, both as leaders of their departments and partners in the broader county criminal justice system.The Effective Pretrial Practices Implementation Toolkit is intended to provide a high-level overview of key topics in local pretrial justice, along with analysis, practice guidance, and resources for probation chiefs. Each section includes an overview of the topic, implementation checklists when applicable, and additional resources for those seeking more detailed reference materials. Consider this toolkit as a “quick-start” guide.This toolkit was developed for the Chief Probation Officers of California by the Pretrial Justice Institute (PJI).