I am seeking clarification regarding the taxability of interest income on U.S. Treasury Bills for a nonresident alien. The taxpayer is a nonresident alien filing Form 1040NR for tax year 2024. TP received a 2024 Form 1099-INT reporting $3,000 in Box 3 as interest income from U.S. Treasury Bills.

It is my understanding that interest income from U.S. Treasury Bills is generally exempt from U.S. tax for nonresident aliens. However, I have been unable to locate the specific tax provision confirming this or if my understanding is incorrect.

Could you please confirm whether this income is taxable and, if exempt, direct me to the relevant authority or publication?

Thank you very much for your time and assistance.