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During the 18th and most of the 19th centuries, the United States had limited regulation of immigration and naturalization at a national level. Under a mostly prevailing "open border" policy, immigration was generally welcomed, although citizenship was limited to "white persons" as of 1790, and naturalization was subject to five-year residency requirement as of 1802. Passports and visas were not required for entry into America; rules and procedures for arriving immigrants were determined by local ports of entry or state laws. Processes for naturalization were determined by local county courts.
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