India supports its stance by citing the Thalweg Doctrine in International Law. The law states that river boundaries between two states may be, if the two states agree, divided by the mid-channel. Though Pakistan does not dispute the 1925 map, it maintains that the Doctrine is not applicable in this case as it only applies to bodies of water that are navigable, which the Kori Creek is not. India rejects the Pakistani stance by maintaining the fact that the creek is navigable in high tide, and that fishing trawlers use it to go out to sea. Several cartographic surveys conducted have supported the Indian claim. Another point of concern for Pakistan is that Kori Creek has changed its course considerably over the years. If the boundary line is demarcated (outlined) according to the Thalweg principle, Pakistan stands to lose a considerable portion of the territory that was historically part of the province of Sindh. Accepting India's stance would also result in the shifting of the land/sea terminus (end) point several kilometres to the disadvantage of Pakistan, leading in turn to a loss of several thousand square kilometres of its Exclusive Economic Zone under the United Nations Convention on Law of the Sea.