Exempt from tax
(a) Exempt from tax. Subject to the provisions of section 1 of the International Organizations Immunities Act (22 U.S.C. 288) (the provisions of which are set forth in paragraph (b)(3) of 1.893-1), the income of an international organization (as defined in section 7701(a)(18)) received from investments in the United States in stocks, bonds, or other domestic securities, owned by such international organization, or from interest on deposits in banks in the United States of moneys belonging to such international organization, or from any other source within the United States, is exempt from Federal income tax.