And as I pointed out to Snoofy, that link conveniently ignores the fact that North Dakota does not require its residents to pre-register to vote. In 47 other States that do pre-register, all require a physical street address on the application. As even your own link shows:
The Turtle Mountain reservation is located in Rolette County in north-central North Dakota. County emergency coordinator Mike Stewart said Monday that residential street addresses have been assigned in "99 percent" of the county -- including on the reservation -- in the past several years.
He agreed with state elections officials that obtaining a residential street address is a no-cost and quick process that may take no more than a few hours.
"It's very possible some homes have been overlooked," Stewart said.
One problem, he said, is that many people don't realize their homes have been assigned a street address, a process that has been ongoing over the past several years.
Stewart said many people still rely on post offices boxes to get their mail.
Sioux County Sheriff Frank Landeis said that also is the case in his county, which contains the Standing Rock Sioux Reservation, North Dakota's largest.
Landeis said residential street addresses have been assigned to every known dwelling in the county, which covers more than 1,100 square miles in south-central North Dakota.
"As far as I know, everybody has an address down here," he said. "If they don't, it's very simple to get one."