363.203—After I purchase my marketable Treasury security in TreasuryDirect ® , is there a period of time during which I may not transfer the security?

Once you purchase a marketable Treasury security in TreasuryDirect, you may not transfer that security for a period of 45 calendar days after the issue date of the security, or the term of the security, whichever is less.

CFR

363.203—After I purchase my marketable Treasury security in TreasuryDirect ® , is there a period of time during which I may not transfer the security?