Pub. L. 86-682, tit. 39, pt. II, ch. 25, sec. 2234
Management of Fund
§ 2234. Management of Fund (a) The Secretary of the Treasury shall hold the Fund, and after consultation with the Postmaster General report to the Congress not later than the first day of January of each year on the financial condition of the Fund as of the end of the next preceding fiscal year. (b) The Secretary of the Treasury shall invest such portion of the Fund as is not, in his judgment, after consultation with the Postmaster General, required to meet current withdrawals. Investments may be made only in interest-bearing obligations of the United States or in obligations guaranteed as to both principal and interest by the United States.