Section 40-18-4
Interest or other income received from obligations of the United States or its possessions, agencies or instrumentalities.
Interest or other income on obligations of the United States, or its possessions, or interest or other income on bonds or other securities of any agencies or instrumentalities of the United States, or of corporations organized under the laws of the United States, received by any resident individual or by any corporation organized under the laws of the State of Alabama, shall be included in the gross income of such person or corporation in determining liability for income taxes due by such person or corporation, but without discrimination, and only to the same extent and in the same manner other income is taxed, insofar as the State of Alabama may be constitutionally or legally authorized to tax such income.
(Acts 1939, No. 62, p. 93; Code 1940, T. 51, §375.)