Adopted by the International Law Association at its Fifty-second Conference held at Helsinki in 1966
The general rules of international law as set forth in these chapters are applicable to the use of the waters of an international drainage basin except as may be provided otherwise by convention, agreement or binding custom among the basin States.
An international drainage basin is a geographical area extending over two or more States determined by the watershed limits of the system of waters, including surface and underground waters, flowing into a common terminus.
A“basin State” is a state the territory of which includes a portion of an international drainage basin.
Each basin State is entitled to a reasonable and equitable share in the beneficial uses of the waters of an international drainage basin.