625.314 Public housing obligations.—An insurer may invest in the bonds, debentures, or other securities of public housing authorities, issued under the provisions of the Act of Congress entitled the “Housing Act of 1949” and approved July 1949; the 1“Municipal Housing Commission Act” or the 1“Rural Housing Commission Act,” and any additional amendments, or issued by any public housing authority or agency in the United States, if such bonds, debentures, or other securities are secured by a pledge of annual contributions to be paid by the United States or any agency thereof.