31 C.F.R. § 353.45 General.
Title 31 - Money and Finance: Treasury
Reissue of a bond may be made only under the conditions specified in these regulations, and only at: (a) A Federal Reserve Bank or Branch, or (b) The Bureau of the Public Debt. Reissue will not be made if the request is received less than one full calendar month before the final maturity date of a bond. The request, however, will be effective to establish ownership as though the requested reissue had been made.
Title 31: Money and Finance: Treasury
PART 353—REGULATIONS GOVERNING UNITED STATES SAVINGS BONDS, SERIES EE AND HH
Subpart I—Reissue and Denominational Exchange
§ 353.45 General.