Mexico: Polity Style: 1823-1917

29 Mar 1823	the executive authority, which had existed since 19 May 1822 as the imperial government, is terminated in accordance with a resolution of the Constituent Congress (Congreso Constituyente) (Constituent Congress Minutes 1823, p. 90)
31 Jan 1824	the Mexican nation is proclaimed a free and independent federal republic, comprising the territory of the former viceroyalty of New Spain, in accordance with a constituent act (Acta Constitutiva de la Federación Mexicana) adopted by the Constituent Congress (Congreso Constituyente) and signed on 31 Jan 1824, effective on promulgation on 31 Jan 1824 (Mexico Congress Minutes 1822-1857, 2:665-667; Constituent Act 1824, pp. 1-20)
4 Oct 1824	the Federal Constitution of the United Mexican States (Constitución Federal de los Estados Unidos Mexicanos) is adopted by the Constituent Congress and signed on 4 Oct 1824, effective on promulgation on 4 Oct 1824 (Mexico Congress Minutes 1822-1857, 2:962; Federal Constitution 1824, pp. 1-62)
4 Oct 1824 - 23 Oct 1835	Estados Unidos Mexicanos
23 Oct 1835	the principles of the new constitutional framework (historically known as Bases constitucionales), effectively terminating the Federal Constitution of 1824, are approved by the Congress, effective on promulgation on 23 Oct 1835 (Diario del Gobierno, No. 186, 2 Nov 1835, p. 249; Diario del Gobierno, No. 185 (error for 187), 3 Nov 1835, p. 254)
23 Oct 1835 - 22 Aug 1846	República Mexicana
22 Aug 1846	the Federal Constitution of 1824 is reinstated in accordance with a decree issued by the officer in charge of the Supreme Executive Power on 22 Aug 1846 (Diario del Gobierno, No. 16, 22 Aug 1846, p. 4)
22 Aug 1846 - 30 Apr 1917	Estados Unidos Mexicanos : República Mexicana [1][2]
16 Sep 1857	the Political Constitution of the Mexican Republic (Constitución Política de la República Mexicana sobre la indestructible base de su legítima independencia proclamada el día 16 de septiembre de 1810 y consumada el 27 de septiembre de 1821) is adopted by the Constituent Congress and signed on 5 Feb 1857, promulgated on 12 Feb 1857, comes into operation on the date (16 Sep 1857) prescribed by the Transitory Article (Siglo Diez y Nueve, No. 3.037, 6 Feb 1857, pp. 2-3; Federal Constitution 1857, pp. 23-82) [3]
1 May 1917	the Political Constitution of the United Mexican States (Constitución Política de los Estados Unidos Mexicanos que reforma la del 5 de febrero de 1857) is adopted by the Constituent Congress and signed on 31 Jan 1917, promulgated on 5 Feb 1917, comes into operation on the date (1 May 1917) prescribed by Art. 1 of the Transitory Provisions (Constituent Congress Journal 1916-1917, 3:644-655; Diario Oficial, No. 30, 5 Feb 1917, pp. 149-161)

República Mexicana continued in official use.
During the period of 1862-1867, significant portions of the United Mexican States (Estados Unidos Mexicanos) were occupied by the armed forces of France supporting the establishment of the Mexican Empire (Imperio Mexicano). The armed conflict between the government formed under the Constitution of 1857 and the imperial regime concluded with the fall of the monarchy and the restoration of the national authority of the United Mexican States.
The Constitution was promulgated by the Interim President of the Republic on 12 Feb 1857 as Constitución Política de la República Mexicana..., but the manuscript signed by the deputies on 5 Feb 1857 and the official publication of 1857 featured Constitución federal de los Estados-Unidos Mexicanos on the title page. República was the term of reference to the polity consistently used in the text. República Mexicana featured only in one article, Estados-Unidos Mexicanos in three.