of clergy, and the constitution of Yucatán, in a vanguardist way, decreed freedom of religion. Repeal and resettlement In 1835, there was a drastic shift to the new Mexican Nation. The triumph of conservative forces in the elections unleashed a series of events that culminated on 23 October 1835, during the interim presidency of Miguel Barragán (the constitutional president was Antonio López de Santa Anna, but he was out of office), when the "Basis of Reorganization of the Mexican Nation" was approved, which ended the federal system and established a provisional centralist system. On 30 December 1836, interim president José Justo Corro issued the Seven Constitutional Laws, which replaced the Constitution. Secondary laws were approved on 24 May 1837. The Seven Constitutional Laws, among other things, replaced the "free states" with French-style "departments", centralizing national power in Mexico City. This created an era of political instability, unleashing conflicts between the central government and the former states. Rebellions arose in various places, the most important of which were: Texas declared its independence following the change from the federalist system, and refused to participate in the centralized system. American settlers held a convention in San Felipe de Austin and declared the people of Texas to be at war against Mexico's central government, therefore ignoring the authorities and laws. Thus arose the Republic of Texas. Yucatán under its condition of Federated Republic declared its independence in 1840 (officially in 1841). The Republic of Yucatán finally rejoined the nation in 1848. The states of Nuevo León, Tamaulipas, and Coahuila became de facto independent from Mexico (in just under 250 days). The Republic of the Rio Grande never consolidated, because independence forces were defeated by the centralist forces. Tabasco decreed its separation from Mexico in February 1841, in protest against centralism, rejoining in December 1842. The Texas annexation and the border conflict after the annexation led to the Mexican–American War. As a result, the Constitution of 1824 was restored by interim President José Mariano Salas on 22 August 1846. In 1847, The Reform Act was published, which officially incorporated, with some changes, the Federal Constitution of 1824, to operate while the next constitution was drafted. This federalist phase culminated in 1853. The Plan of Ayutla, which had a federalist orientation, was proclaimed on 1 March 1854. In 1855, Juan Álvarez, interim President of the Republic, issued the call for the Constituent Congress, which began its