31 CFR §363.160

1. (a)This subpart governs:
   1. (1)The process of converting definitive savings bonds of all eligible series and types of registration to book-entry bonds in TreasuryDirect ®;
   2. (2)Converted savings bonds of all series registered in the coowner form of registration, unless the non-converting coowner consents to a change in the registration of the bonds after conversion;
   3. (3)Converted savings bonds of Series E registered in the owner with beneficiary form of registration, unless the beneficiary consents to a change in the registration of the bonds after conversion; and
   4. (4)Converted savings bonds of all series that are held as gift bonds by the person who converted the bonds.
2. (b)Subpart C governs:
   1. (1)Converted savings bonds of any series registered in the single owner or entity form of registration;
   2. (2)Converted Series EE and Series I savings bonds registered in the owner with beneficiary form of registration;
   3. (3)Converted Series E savings bonds registered in the owner with beneficiary form of registration, where the beneficiary has consented to a change in the registration of the bonds after conversion; and
   4. (4)Converted savings bonds of all series registered in the coowner form of registration, where the non-converting coowner has consented to a change in the registration of the bonds after conversion.