The Confederation Congress (1781-1789) passed an important law setting steps by which territories could become states. What was the name of this law?

The law passed by the Confederation Congress that established the process for territories to become states is known as the Northwest Ordinance of 1787. This legislation outlined the governance of the Northwest Territory and set forth the criteria for admitting new states to the Union, emphasizing principles such as the prohibition of slavery in the territory and the promotion of education. The Northwest Ordinance was significant in shaping the expansion and development of the United States.