What Did the Mexican Government Require of the First Wave

What did the Mexican government require of the first wave of American immigrants beginning in 1823?

A) That they establish a slave-based plantation system in Mexico
B) That their numbers not exceed 500 total
C) That they were practicing Roman Catholics
D) That men arrive first, establish settlements, and then send for family members
E) That they agree to protect Mexico from further encroachments by other Americans and Europeans