Article IX granted states the power to

Article IX of the United States Constitution grants states the power to regulate their own internal affairs, including the ability to make and enforce laws, establish and maintain their own educational systems, and administer justice within their borders. This article acknowledges that state governments have the authority to govern themselves and protect the rights and interests of their citizens. It also outlines the relationship between the federal government and the states, acknowledging that states have certain powers and responsibilities while the federal government has its own separate set of powers as outlined in the Constitution.