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The TN nonimmigrant classification permits qualified Canadian and Mexican citizens to seek temporary entry into the United States to engage in business activities at a professional level. A list of TN professionals can be found on Appendix 1603.D.1 on the NAFTA website.
See also Maintaining TN Status.
The E-3 nonimmigrant classification permits Australian citizens come to the United States to perform services in a specialty occupation. A specialty occupation requires theoretical and practical application of a body of knowledge in professional fields and at least the attainment of a bachelor's degree, or its equivalent, as a minimum for entry into the occupation in the United States.
See also Maintaining E-3 Status.
The O-1 nonimmigrant classification is for individuals who possess extraordinary ability in the sciences, arts, education, business, or athletics.
See also Maintaining O-1 Status.
Employment is NOT authorized for visitors for business in B-1 or WB status.
See also Maintaining B-1 and WB Status.