Series I savings bonds that were originally issued as definitive bonds may be converted to book-entry bonds through TreasuryDirect[supreg], an online system for holding Treasury securities. The Web address for TreasuryDirect[supreg] is www.treasurydirect.gov. Bond owners who wish to convert their definitive savings bonds should follow online instructions for conversion. Regulations governing converted bonds are found at 31 CFR part 363. [70 FR 14942, Mar. 23, 2005]