12 U.S.C. § 1735f–6

In carrying out the provisions of subchapter II of this chapter with respect to insuring mortgages secured by a one- to four-family dwelling unit, the Secretary may not deny such insurance for any such mortgage solely because the dwelling unit which secures such mortgage will be subject to a secondary mortgage or loan made or insured, or other secondary lien held, by any State or local governmental agency or instrumentality under terms and conditions approved by the Secretary.