Read the mexican government’s bustamante decree of april 1830. article 9. the introduction of foreigners across the northern frontier is prohibited under any pretext whatsoever, unless the said foreigners are provided with a passport issued by the agent of the republic at the point whence the said foreigners set out. article 10. no change shall be made with respect to the slaves now in the states, but the federal government and the government of each state shall most strictly enforce the colonization laws, and prevent the further introduction of slaves. the bustamante decree directly affected which event?