The provision establishing the S visa in the INA was originally due to expire on September 13, 1999, but Congress had extended it until September 13, 2001. Aliens admitted through the S visa categories are designated as S-5 and S-6 nonimmigrants. Request for these visas must be filed by a state or federal law enforcement agency, and the filing agency must assume responsibility for the alien from their time of entry until their departure, or until they adjust status.
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There are two nonimmigrant visa categories for persons who want to participate in Exchange Visitor programs in the United States. The J nonimmigrant classification is for participants of exchange programs, designated by the Department of State, that are designed to promote educational and cultural exchanges between the United States and other countries. The Q nonimmigrant classification is for participants of international cultural exchange programs designated by the Department of Homeland Security.