With regard to regional anti-corruption regimes, many regional organizations, including ECOWAS, the African Union and the Arab League, introduced anti-corruption conventions during the 2000s. Before that, however, OAS, the EU, OECD and CoE had already adopted similar anti-corruption conventions or treaties. Among these, OAS ‘was the first to adopt a binding treaty dedicated to anti-corruption’ (Lohaus, 2015: 159) with the signing of the Inter-American Convention Against Corruption.