What was required of the people who wanted to settle in Texas before Mexican Revolution?

Become Mexican citizens: Applicants had to pledge allegiance to the Mexican government, renounce their former citizenship, and adopt the Mexican constitution and laws.

Bring in families: Applicants were expected to bring their families with them, as part of the Mexican objective of increasing European immigration to Texas and to encourage settlement of Texas by non-Indians

Convert to Catholicism: Prospective settlers had to declare themselves Roman Catholic. However, this requirement was largely ignored after 1827 when the Mexican government stopped keeping formal records of religious affiliation.

Obtain a land grant: Applicants had to request and receive a land grant from the government or purchase land from existing owners.

Take an Oath of Allegiance: Mexican citizens were required to swear an oath of allegiance to the Mexican Constitution of 1824.