The CSF occupies the subarachnoid space (between the arachnoid mater and the pia mater) and the ventricular system around and inside the brain and spinal cord. It constitutes the content of the ventricles, cisterns, and sulci of the brain, as well as the central canal of the spinal cord.
The MOST important fact is that ONLY ONE Article V application is required from each of 34 different states to require Congress to call an Article V Convention, and 49 of all 50 of the states have already filed at least ONE Article V application.
According to Article VII, the Constitution was required to be ratified by 9 of the 13 states before it went into effect. This process was completed on June 21, 1788 with the ratification by the state of New Hampshire. All 13 eventually ratified, the last two being North Carolina (1789) and Rhode Island (1790).