Louisiana: Polity Style: 1812-2025

30 Apr 1812	the Constitution or Form of Government of the State of Louisiana, adoped by the Convention of the Territory of Orleans on 22 Jan 1812, is approved, Louisiana is admitted to the United States under the name of the State of Louisiana in accordance with an act passed by the Congress of the United States (Senate on 1 Apr 1812, House of Representatives on 20 Mar 1812), signed into law on 8 Apr 1812, effective on the date (30 Apr 1812) prescribed by Sec. 6 of the said act (Louisiana Convention 1811-1812, p. 15; Statutes at Large, 2:701-704) [1]
30 Apr 1812 -	State of Louisiana [2]
26 Jan 1861	Louisiana seceded from the United States in accordance with an ordinance passed by the Convention on 26 Jan 1861 (Louisiana Convention 1861, 17-18, 130-131, 230-231) [3]
8 Feb 1861	Louisiana formed part of the Confederate States of America on the date when the Constitution for the Provisional Government of the Confederate States of America was approved by the Congress and came into operation (Confederate Congress Journal, 1:39; Confederate Statutes at Large, pp. 1-8)
25 Jul 1864	the ordinance of secession of 1861 is declared to have been null and void in accordance with a resolution of the Constitutional Convention of 25 Jul 1864 (Louisiana Constitutional Convention Journal 1864, 168-169; Louisiana Constitutional Convention Debates 1864, 620-621) [4]
9 Jul 1868	Louisiana is re-admitted to representation in the Congress of the United States in accordance with an act passed by the Congress of the United States (House of Representatives on 14 May 1868; Senate on 10 Jun 1868 with amendments; the amendments were concurred in by the House on 12 Jun 1868; vetoed by the President of the United States on 25 Jun 1868; the veto was overridden by the House of Representatives and by the Senate on 25 Jun 1868), took effect in Louisiana immediately upon the passage of a resolution approving the Amendment XIV to the Constitution of the Unites States by the General Assembly of the State of Louisiana (Statutes at Large, 15:73, 15:704-705; Louisiana Session Laws, 1868, 3-4) [5]

Full title: An Act for the admission of the State of Louisiana into the Union, and to extend the laws of the United States to the said state.
Also in official use (French): État de la Louisiane.
Full title: An Ordinance to dissolve the union between the State of Louisiana and other States, united with her under the compact entitled "The Constitution of the United States of America."
The resolution of 25 Jul 1864 affected only the territories of the State of Louisiana controlled by the government, supporting the United States.
Full title: An Act to Admit the States of North Carolina, South Carolina, Louisiana, Georgia, Alabama, and Florida, to Representation in Congress.