systems into one district system in which each state comprised one district. The Provisional Constitution was then unanimously ratified around midnight on February 8, 1861. It was signed by all members present at noon on the day of Jefferson Davis's inaugural address, February 18, 1861. There are 50 signatures in all, including those of the Texas delegation who were admitted on March 2. The Provisional Constitution was replaced after the ratification of the permanent Constitution of the Confederate States of America, on March 11, 1861. Since the framers of the Provisional Constitution used the US Constitution as a basis for their own, there are many similarities. Large sections were copied without any change, and others had only cosmetic changes (such as replacing "United States" with "Confederate States" or "Confederacy"). There were also several noticeable differences, including the aforementioned changes, as well as a clause to allow Congress to use a two-thirds vote to declare the president unable to perform his duties. Article IV permitted Congress to amend the constitution with another two-thirds vote, and Article VI granted Congress the power to admit other states into the confederacy. In its haste, the Committee of Twelve neglected to include important features such as a ratification process and decided to omit any mention of controversial issues regarding slavery and tariffs, issues that were to be decided in the permanent constitution. However, the most significant difference from the US Constitution was that under the Provisional Constitution, the Provisional Confederate Congress was a unicameral legislature, with only one chamber, and voting was by states. That was changed to the more-familiar bicameral legislature in the permanent constitution, with senators and representatives voting individually. Slavery was dealt with very briefly in the Provisional Constitution. Since the Provisional Constitution did not provide for a House of Representatives, the section dealing with how slaves should be counted for census purposes was omitted. Article I, Section 7, of the Provisional Constitution outlawed the overseas slave trade but allowed importation from the slaveholding US states. However, Congress could ban importation of slaves from "any State not a member of this Confederacy." That differs from the US Constitution in which Article I, Section 9 allows but does not require a ban on the "Migration or Importation of such Persons as any of the States now existing shall think proper to admit" effective January 1, 1808. Article IV, Section 2, of the Provisional