(2)
the amount of funds which will be available during such year for the making of such expenditures,
and if, on the basis of such estimate, he determines that the amount described in paragraph (2) is in excess of the amount necessary—
(4)
to provide a reasonable contingency fund so as to assure that there will, during all times in such year, be sufficient sums available in the Account to meet the expenditures described in paragraph (1),
he shall certify the amount of such excess to the Secretary of the Treasury and the Secretary of the Treasury shall transfer, from the Account to the general fund of the Treasury, an amount equal to such excess.