Immigration of United States citizens, some legal, most illegal, had begun to accelerate rapidly.
The law specifically banned any additional American immigrants from settling in Mexican Territory, which included California and Texas, along with the areas that would become Arizona, parts of Colorado, Nevada, New Mexico, and Utah.
[3] Almost all of Mier y Terán's recommendations were adopted in a series of laws passed on April 6, 1830, under President Anastasio Bustamante.
He further increased tariffs on goods entering Mexico from the United States, causing their prices to rise.
[10] Regarding slavery, influential settler Stephen F. Austin, who reasoned that the success of his colonies needed slave labor and the economics it produced to lure more whites to the area, used his relationships to get an exemption from the law.