14 C.F.R. § 152.423
(b) Investigations and informal resolutions. The Departmental Office of Civil Rights will make a prompt investigation whenever a complaint, compliance review, report, or any other information indicates a possible failure to comply with this subpart. The procedures in 49 CFR part 21, augmented as appropriate by the investigative procedures of part 13 of this chapter, will be followed, except that—
(c) When the FAA (under section 30 of the AADA) and another Federal agency, a referral agency recognized by the Equal Employment Opportunity Commission, or a court have concurrent jurisdiction over a matter—
(2) If it appears that delay, through referral to another agency, will result in the continued expenditure of Federal funds under this part without compliance with this subpart, the Secretary may—