Section XIII Surplus of Duties granted towards Payment of Interest of Transport Debt by former Acts and this Act to remain in the Exchequer.

And be it further enacted by the Authority aforesaid That in Case it shal so happen that the several additional Dutyes and Impositions granted to His Majesty by several Acts of Parliament towards Payment of Interest of the said Transport Debt together with the Duties to be raised by virtue of this Act shal amount to more than what may prove sufficient for Payment of Interest at Five Pounds per Cent[um] for the said Transport Debt according to the several Debentures made and to be made out that than and in such Case such Surplus ariseing by the said Duties more than sufficient for Payment of the Interest shal remaine in the Exchequer and not be disposed of otherwise than by an Act of Parliament expressly made in that behalf.