Provided alwayes and it is hereby declared and enacted That all and every person and persons importing any of the Liquors aforesaid within the time aforesaid by way of Merchandise who shall pay the Dutyes which by this Act are due and payable in ready moneyes shall be allowed and abated out of the said Dutyes after the rate of Ten pounds per Cent for a yeare in consideration of such ready money soe paid downe and advanced.