High Quality Content by WIKIPEDIA articles! The Constitution of the State of Oklahoma is the governing document of the U.S. State of Oklahoma. Adopted in 1907, Oklahoma ratified the United States Constitution on November 16, 1907, as the 46th US State. At its ratification, the Oklahoma Constitution was the longest governing document of any government in the world. All U.S. state constitutions are subject to federal judicial review; any provision can be nullified if it conflicts with federal law or the US Constitution.