CFR > Title 24 - Housing and Urban Development > SUBTITLE B—Regulations Relating to Housing and Urban Development > CHAPTER III—GOVERNMENT NATIONAL MORTGAGE ASSOCIATION, DEPARTMENT OF HOUSING AND URBAN DEVELOPMENT (parts 300 to 351) > PART 320—GUARANTY OF MORTGAGE-BACKED SECURITIES > SUBPART B—Bond-Type Securities (§320.21 to §320.33) > 320.27—Mortgages.