Answer:
Consent of a fair compensation to the Native Americans for their lands
Step-by-step explanation:
The Ordinance directs that “the utmost good faith shall always be observed towards Indians; their land and property shall never be taken from them without their consent.”
On the same Ordinance a new method for adding new territories and States was providen. This allowed the U.S. "to expand its boundaries to the Pacific—which would result in the taking of lands from hundreds of Indian tribes".
Reference: U.S. National Library of Medicine. “The Northwest Ordinance Guarantees Tribal Land Rights - Timeline - Native Voices.” U.S. National Library of Medicine, National Institutes of Health