A Second Preference applicant must generally have a labor certification approved by the Department of Labor. A job offer is required and the U.S. employer must file an Immigrant Petition for Alien Worker, Form I-140, on behalf of the applicant. Applicants may apply for an exemption, known as a National Interest Waiver, from the job offer and labor certification if the exemption would be in the national interest, in which case the applicant may file the Immigrant Petition for Alien Worker, Form I-140, along with evidence of the national interest. Professionals Holding Advanced Degrees and Persons of Exceptional Ability receive 28.6 percent of the yearly worldwide limit of employment-based immigrant visas, plus any unused visas from the Employment First Preference category. There are two subgroups within this category:
- Professionals holding an advanced degree (beyond a baccalaureate degree), or a baccalaureate degree and at least five years progressive experience in the profession.
- Persons with exceptional ability in the sciences, arts, or business. Exceptional ability means having a degree of expertise significantly above that ordinarily encountered in the sciences, arts, or business.