Regulations have not explicitly defined "National Interest". However, the Immigration Service has recognized the following criteria in determining whether the national interest is met:
There are several advantages to filing a National Interest Waiver and obtaining an approval in this category. Since the waiver is of the job offer requirement, it does not require that a specific job be offered to the to a U.S. worker by an employer. As a practical matter, the principle advantage in many cases is that one does not have to go through the labor certification process to show that there is a shortage of qualified U.S. workers for a particular position.
The term "Advanced Degree Professional" means that the beneficiary either has an advanced degree (M.A., M.S., M.E., M.D. or Ph.D.) or its equivalent, and is working in an area that requires at least a Bachelor's degree or is traditionally regarded as a profession, such as lawyers, doctors, architects, engineers and teachers. A Bachelor's degree plus five years' experience in a professional or progressive occupation may also satisfy the qualification requirement of an "advanced degree."
The threshold requirement for a national interest waiver is a master's degree or "exceptional ability" in your field.
The main requirement is a three-part test.