Mexico’s newly established National Anti-corruption System (NACS), signed into law on 18 July 2016, has the potential to become a game-changer in the country’s fight against corruption. The package of laws creating the System - eight in total - mark a turning point in Mexico’s approach to anti-corruption policies, and aim to overcome some key shortcomings of the past by: 1) addressing fragmentation in policies and developing a more comprehensive and coherent approach to integrity; 2) avoiding notorious “implementation gaps” by improving co-ordination both across and between levels of government, and particularly by bringing states under the remit of the system; 3) strengthening enforcement mechanisms for investigating and sanctioning integrity breaches by public officials and firms under both administrative and criminal jurisdictions; and 4) reinforcing oversight through greater transparency, expanded auditing powers and greater involvement of civil society.