evidence: - Susta region is located on the banks of the Gandak river. The Gandak river is also called as the Narayani river in Nepal. [...] - But due to frequent change of course by the Gandak river, the Susta region at present belongs to the Eastern part (I.e., belongs to India). This is not accepted by Nepal. [...] First, In the 1980s, both countries set up a Joint Technical Level Boundary Working Group. It succeeded in the demarcation of all territories except Kalapani and Susta. Both governments have to create such a joint working group to resolve the dispute.