31 C.F.R. § 363.202 What marketable Treasury securities may I purchase and hold through my TreasuryDirect® account?
Title 31 - Money and Finance: Treasury
(a) Purchase. You may purchase any marketable Treasury security that is available for purchase through the TreasuryDirect Web site. (b) Hold. You may transfer into the system and maintain in your TreasuryDirect account any eligible marketable book-entry Treasury bill, note, or bond.
Title 31: Money and Finance: Treasury
PART 363—REGULATIONS GOVERNING SECURITIES HELD IN TREASURYDIRECT
Subpart F—Marketable Treasury Securities
§ 363.202 What marketable Treasury securities may I purchase and hold through my TreasuryDirect