The first constitution of the Mexican republic was drafted after the demise of the short-lived monarchy of Agustin I, the first independent post-colonial state in Mexico after the Mexican War of Independence wrested control from Spain. This constitution was modeled on the Spanish Constitution of 1812.
Constitutive Acts of the Mexican Federation 21 of January, 1824, also Federal Constitution of the United Mexican States October 4, 1824. Laws of Texas. Compiled by H. P. N. Gammel. 12 vols. Austin: The Gammel Book Company, 1898. Volume 1, pp. 71-93.
Title III: Of the Legislative Power
Title IV: Of the Supreme Executive Power of the Confederation
Title V: Of the Judicial Power of the Union
Title VI: Of the States of the Federation