What is the approval of 9 of 13 states?

The approval of 9 out of 13 states typically refers to a requirement in certain governance structures for a decision or agreement to be valid, such as in the context of the Articles of Confederation in the United States. Under this framework, 9 states needed to agree for significant legislative measures to be enacted. This method ensured that a majority of states supported actions, reflecting a consensus before proceeding. However, it also highlighted challenges in governance, as achieving such a majority could be difficult.