45 CFR § 50.4 - Waivers for research.
In determining whether to request a waiver for an Exchange Visitor engaged in the conduct of research, the Board considers the following key factors:
(a) The program or activity at the applicant institution or organization in which the Exchange Visitor is employed must be of high priority and of national or international significance in an area of interest to the Department.
(b) The Exchange Visitor must be needed as an integral part of the program or activity, or of an essential component thereof, so that loss of his/her services would necessitate discontinuance of the program, or a major phase of it. Specific evidence must be provided on how the loss or unavailability of the individual's services would adversely affect the initiation, continuance, completion, or success of the program or activity. The applicant organization/institution must clearly demonstrate that a suitable replacement for the Exchange Visitor cannot be found through recruitment or any other means. The Board will not request a waiver when the principal problem appears to be one of administrative, budgetary, or program inconvenience to the institution or other employer.
(c) The Exchange Visitor must possess outstanding qualifications, training and experience well beyond the usually expected accomplishments at the graduate, postgraduate, and residency levels, and must clearly demonstrate the capability to make original and significant contributions to the program. The Board will not request a waiver simply because an individual has specialized training or experience or is occupying a senior staff position in a university, hospital, or other institution.