31 C.F.R. § 337.13 Payment of mortgage insurance premiums.
Title 31 - Money and Finance: Treasury
When book-entry debentures are being purchased prior to maturity to pay for mortgage insurance premiums, the difference between the amount of the debentures purchased and the mortgage insurance premiums shall be issued to the owner in the form of a book-entry debenture in the exact amount of such difference, provided it is one dollar ($1.00) or more.
Title 31: Money and Finance: Treasury
PART 337—SUPPLEMENTAL REGULATIONS GOVERNING FEDERAL HOUSING ADMINISTRATION DEBENTURES
Subpart B—Book-Entry Debentures
§ 337.13 Payment of mortgage insurance premiums.