(a) If the Administrator determines that moneys in the fund are in excess of current needs he may request the investment of such amounts as he deems advisable by the Secretary of the Treasury in direct, general obligations of, or obligations guaranteed as to both principal and interest by, the United States of America.

(b) With the approval of the Secretary of the Treasury, the Administrator may deposit moneys of the fund in any Federal Reserve bank or other depository for funds of the United States of America, or in such other banks and financial institutions and under such terms and conditions as the Administrator and the Secretary of the Treasury may mutually agree.