; (B) against equity and good conscience; or (C) contrary to the best interests of the United States. (2) Regulations The Administrator may establish, by regulations, procedures for determining the amount of the repayment required under this subsection and the circumstances under which an exception to repayment may be granted. The Administrator may specify in the regulations the conditions under which financial assistance to be paid to a member of the program will not be made if the member no longer satisfies the requirements in subsection (c) or qualifications in subsection (d) for such assistance. (3) Nature of obligation An obligation to repay the United States under this subsection is, for all purposes, a debt owed the United States.