The main purpose of the Law of April 6, 1830 was to — block Mexicans from settling in Texas

end the trade between Texas and Mexico

prevent Texas from declaring independence

stop immigration from the United States to Texas

Stop immigration from the United States to Texas.

Explanation:

The central purpose of the Law of April 6, 1830, was to obstruct immigration from the United States to Texas. It's generally believed that the Law of April 6 1830, sparked the Texas Revolution because of its laws and regulations. The law came as a result of advice and information from Manuel de Mier y Terán. Under this law, European and Mexican immigration was encouraged. Custom duties put on all goods entering Texas from the United States and slavery banned.  

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