42 U.S.C. § 4156 - U.S. Code - Unannotated Title 42. The Public Health and Welfare § 4156. Waiver and modification of standards

(1) is authorized to modify or waive any such standard, on a case-by-case basis, upon application made by the head of the department, agency, or instrumentality of the United States concerned, and upon a determination by the Administrator or Secretary, as the case may be, that such modification or waiver is clearly necessary, and

(2) shall establish a system of continuing surveys and investigations to insure compliance with such standards.