evidence: Tensions have been flaring between the United Republic of Tanzania (Tanzania) and the Republic of Malawi (Malawi) for the past few years relating to whether the boundary demarcating the respective states’ sovereign territory or territorial waters in respect Lake Malawi or Lake Nyasa as Tanzania refers to it (Lake) runs along the middle of the Lake or along the Lake’s eastern shoreline of the territory of Tanzania. [...] By virtue of the Treaty, customary international law dictates that the default legal position is that the border of Malawi runs along the north-eastern shoreline of the Lake and is, in its entirety, under the sovereign control of Malawi. The onus is on Tanzania to demonstrate that the legal position established by the Treaty was amended to reflect that the border runs along the middle of the Lake and that the shoreline boundary is accordingly incorrect.