(1) Interest on United States government obligations, and mutual fund dividends attributable to that interest, to the extent included in federal adjusted gross income, are exempt from Montana income tax. Interest on obligations of U.S. territories and government agency obligations specifically exempted by federal law, and mutual fund dividends attributable to that interest, are also exempt from Montana income tax.

(2) Obligations guaranteed by the United States government are not tax-exempt. Interest on, and mutual fund dividends attributable to, Government National Mortgage Association (Ginnie Mae) bonds, Federal National Mortgage Association (Fannie Mae) bonds, and Federal Home Loan Mortgage Corporation (FHLMC) securities are not exempt.

(3) United States obligations that are exempt include:

(a) series E, F, G, and H savings bonds;

(b) U.S. treasury bills;

(c) U.S. government notes; and

(d) U.S. government certificates.