The rule-of-law tools will provide practical guidance to field missions and transitional administrations in critical transitional justice and rule of law-related areas. The tools are intended to outline the basic principles involved in: Mapping the Justice Sector, Prosecution Initiatives, Truth Commissions, Vetting and Monitoring Legal Systems.This publication specifically addresses the issue of mapping the justice sector and some key related institutions and is intended to assist United Nations field staff in understanding how the justice sector actually worked in the State prior to and during the conflict, and how it should function if the rule of law is to take root. It provides an overview of the key institutions, related entities or mechanisms, and identifies priorities such as the linkages between core institutions and the utility of oversight bodies. The High Commissioner refers to the Basic Principles on the Role of Lawyers and establish universal standards of conduct and are a good place to start when working with national lawyers’ organizations.