What process did the article create for admitting new state?

The article establishes a process for admitting new states by requiring a prospective state to submit a petition for admission to Congress. This petition must demonstrate the state's readiness for statehood, including a commitment to the Constitution and a republican form of government. Congress then evaluates the petition, and if approved, passes an admission act, which the President signs to officially grant statehood. This process ensures that new states meet certain criteria before being integrated into the Union.