34 C.F.R. § 668.55
(b)
(c) An institution may require an applicant to update FAFSA information under paragraph (a) or (b) of this section for a change in the applicant's marital status if the institution determines the update is necessary to address an inequity or to reflect more accurately the applicant's ability to pay.
Approved by the Office of Management and Budget under control number 1845-0041)
(Authority: 20 U.S.C. 1094)