24 C.F.R. § 81.91 Maintenance of GSE Securities.
Title 24 - Housing and Urban Development
A GSE Security may be maintained in the form of a Definitive GSE Security or a Book-entry GSE Security. A Book-entry GSE Security shall be maintained in the Book-entry System.
Title 24: Housing and Urban Development
PART 81—THE SECRETARY OF HUD'S REGULATION OF THE FEDERAL NATIONAL MORTGAGE ASSOCIATION (FANNIE MAE) AND THE FEDERAL HOME LOAN MORTGAGE CORPORATION (FREDDIE MAC)
Subpart H—Book-Entry Procedures
§ 81.91 Maintenance of GSE Securities.