It established procedures for how territories could become states.
Explanation:
The Northwest Ordinance set up procedures for how territories were to be admitted to the Union as states. The ordinance specified that the Northwest Territory would be divided into three to five territories. Once a territory had a population of 5,000 adult males, the territory could elect representatives to form a legislature. When there were 60,000 people living in the territory, it could apply for statehood. These procedures were followed as the United States acquired other territories in the West.