Section 353.0 - Applicability(a) The regulations in this part govern definitive (paper) Series EE savings bonds that have not been converted to book-entry bonds through TreasuryDirect® and definitive Series HH savings bonds. These bonds bear issue dates of January 1, 1980, or thereafter.(b) The regulations in 31 CFR part 315 govern all other definitive United States Savings Bonds and Savings Notes.(c) The regulations in 31 CFR part 363 govern Series EE savings bonds that were originally issued as book-entry bonds in TreasuryDirect® and Series EE savings bonds that were converted to book-entry bonds through TreasuryDirect®. 68 FR 24805 , May 8, 2003, as amended at 70 FR 14941 , Mar. 23, 2005