Niagara River. Temporary diversion for power purposes of additional waters of Niagara River, texts of notes exchanged at Washington May 20, 1941, between Governments of United States and Canada, amending in its application art. 5 of treaty signed Jan. 11, 1909, between United States and United Kingdom, to permit for duration of emergency and in all events subject to reconsideration by both Governments, Oct. 1, 1942, additional diversion, for power purposes, of waters of Niagara River above the Falls.