Additional reforms could also improve access to complementary insurance for low-income households and their health in the medium term (CNAMTS, 2016a), notably by promoting the use of existing administrative data on income and other social spending to determine and verify access to ACS vouchers. Indeed, past experiments have shown that eligible households, mostly long-term unemployed and retirees, may be difficult to reach through information campaigns (Guthmuller et al., The sustainability of the ACS scheme could be improved in part by reviewing the eligibility conditions (Cour des comptes, 2015).