In Mexican system of government a/an is a system where government holds title to the land but its right to use are parceled out to village communities and then to individuals for cultivation

Ejidos

Explanation:

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 I assume that your question is based on a text, and since you didn't attach the text,  I can only give some general information about this act:

It shifted the focus from nationality to skills, that is, more skilled workers could enter the US, including from Asia. This means that the number of Asian immigrants to the US increased.