29 C.F.R. § 4.10
(b) Prerequisites for hearing.
(1)
(i) A request for a hearing under this section may be made by the contracting agency or other person affected or interested, including contractors or prospective contractors and associations of contractors, representatives of employees, and other interested Governmental agencies. Such a request shall be submitted in writing to the Administrator, Wage and Hour Division, Employment Standards Administration, U.S. Department of Labor, Washington, DC 20210, and shall include the following:
(3) Pursuant to section 4(b) of the Act, requests for a hearing shall not be considered unless received as specified below, except in those situations where the Administrator determines that extraordinary circumstances exist: