Section 359.1 - What regulations govern Series I savings bonds?(a) The regulations in 31 CFR part 360 apply to definitive (paper) Series I savings bonds that have not been converted to book-entry bonds through New Treasury Direct.(b) The regulations in 31 CFR part 363 apply to:(1) book-entry Series I savings bonds that were originally issued as book-entry bonds in New Treasury Direct; and(2) definitive Series I savings bonds that have been converted to book-entry bonds through New Treasury Direct.(c) We expressly disclaim any representations or warranties regarding Series I savings bonds that in any way conflict with these regulations and other applicable law. 67 FR 64278 , Oct. 17, 2002, as amended at 70 FR 14942 , Mar. 23, 2005