The E-3 visa is designed for citizens of Australia who want to come to the United States to work in a specialized job. A "specialty occupation" is a type of job that demands both theoretical and practical expertise in a specific field, and individuals entering such occupations in the U.S. must have at least a bachelor's degree or higher in that particular field, or an equivalent qualification. This definition aligns with the definition of a specialty occupation under the Immigration and Nationality Act for the H-1B visa.