Thereafter, payments from time to time on account of the unpaid balance of each remaining award made pursuant to
section 4132 of this title or recertified pursuant to subsection (b) of
section 4139 of this title which shall bear to such unpaid balance the same proportion as the total amount in the War Claims Fund and available for distribution at the time such payments are made bears to the aggregate unpaid balances of all such awards. No payment made pursuant to this paragraph on account of any award shall exceed the unpaid balance of such award. Payments heretofore made under
section 1641i of title 22, on awards made against the Government of Hungary under
section 1641b(1) of title 22, and recertified under subsection (b) of
section 4139 of this title, shall be considered as payments under this paragraph and no payment shall be made on any recertified award until the percentage of distribution on awards made under
section 4132 of this title exceeds the corresponding percentage of distribution on such recertified award:
Provided, That no payment made on awards recertified under subsection (b) of
section 4139 of this title shall exceed 40 per centum of the amount of the award recertified.