It's apparently a tyranny going all the way back to the initial application of European hegemony at the beginning of honkie exploration of the Americas.
Everybody on Earth follows some sort of standard ~ in the United States we follow BOTH the big ones. That's cause were' HUGE.
That gave the Iroquis total possession of the creek, it's tributaries, and all the water drinking game animals on the other side.
They may have done it differently in the core area of New York where they had to deal only with other Confederation members and their slaves.
BTW, that gave them exclusive control of the water rights.