The Revitalised Agreement on the Resolution of Conflict in South Sudan (R-ARCSS) signed on 12 September 2018, not only allows for a new government and security arrangements, it also provides for two new commissions to decide the number of internal states and their boundaries. In the following Q and A, RVI fellows Douglas Johnson (DJ) and Aly Verjee (AV), joined by Matthew Pritchard (MP), US Institute of Peace researcher, discuss the history of boundary-making in South Sudan, and the prospects for the new commissions to resolve the underlying disagreements.