Answer:
All legislative bodies of the provisional and regular governments appointed committees to frame a colonization law, but the first such law was that passed by the Junta Instituyente, Emperor Agustín de Iturbide's rump congress, on January 3, 1823. This law invited Catholic immigrants to settle in Mexico; provided for the employment of agents, called empresarios, to introduce families in units of 200; defined the land measurement in terms of labores (177 acres each), leagues or sitios (4,428 acres), and haciendas (five leagues each); and defined the privileges and certain limitations of immigrants and empresarios. Families who farmed were promised at least a labor of land, those who raised cattle, a league, those who both farmed and raised cattle, a labor and a league. Settlers were free of tithes and other taxes for six years and subject only to half payments for another six years; families might import "merchandise" free of duty and tools and materials for their own use to the value of $2,000; and settlers became automatically naturalized citizens upon residence of three years, if married and self-supporting. An empresario might receive premium lands to the amount of three haciendas and two labors (roughly 66,774 acres) for settling 200 families. Total premiums and permanent holdings of empresarios were limited. Article 30 of the law, by inference, permitted immigrants to bring slaves into the empire but declared children of slaves born in Mexican territory free at the age of fourteen and prohibited domestic slave trading, a limitation that was sometimes evaded. The law provided for settlement by the local governments of immigrants not introduced by empresarios. The law was annulled by the abdication of the emperor in March 1823, but the provisional government that succeeded Iturbide applied its terms by special decree to Austin's first colony in April 1823.
The National Colonization Law. After the fall of Iturbide, Mexico adopted a federal system similar to that of the United States, and the federal Congress passed the national colonization law on August 18, 1824. This law and the state law of Coahuila and Texas of March 25, 1825, became the basis of all colonization contracts affecting Texas except Austin's first contract. In effect, the national law surrendered to the states authority to set up regulations to dispose of unappropriated lands within their limits for colonization, subject to prescribed limitations. All state laws had to conform to this act and to the federal constitution; no lands could be granted within twenty leagues of an international boundary or within ten leagues of the coast without the approval of the federal executive authority; Congress agreed to make no major change in the policy of immigration before 1840 but reserved the right to stop immigration from particular nations in the interest of national security. Titles were limited to residents and were not to exceed eleven leagues to an individual.
The State Colonization Law. The state law specifically accepted the limitations imposed by the federal act; gave heads of families who immigrated a league of land with the provision that they should pay the state a nominal fee in installments at the end of the third, fourth, fifth, and sixth years after settlement; and authorized the executive to enter into contracts with empresarios for the introduction of specified numbers of families, for which service they should receive five leagues of land per hundred families after their settlement. For ten years following settlement the colonists were to be tax-free, except for contributions to repel invasion. Colonists acquired citizenship by settlement. Land commissioners who issued titles and surveyors were to be paid by the colonists. Thirty or more empresario contracts were made, contemplating introduction of some 9,000 families. Some of the contracts were concluded under this law by surrender, annulment, or consolidation of previous contracts. All grants were defined by more or less definite geographical boundaries, all empresarios had six years in which to carry out contracts, and in effect this provision deprived the state of control of vast areas during the pendency of the contracts.
On April 6, 1830, the federal government made use of a reservation of the law of August 18, 1824, and forbade settlement of emigrants from the United States in Texas and suspended contracts in conflict with this prohibition (see LAW OF APRIL 6, 1830). By interpretation, Austin obtained exemption from suspension for his own contracts and that of Green DeWitt. Congress repealed the anti-immigration articles of the law in May 1834; all contracts were automatically restored and extended by the state congress or legislature for four years to compensate for the previous suspension. All Mexican contracts ended with the Texas Declaration of Independence.