Provided always and be it enacted That it shall and may be lawfull to and for His Majesty His Heires and Successors out of the said Duties granted and continued by this Act to cause such Su[m]m and Su[m]ms of Money to be expended & paid from time to time for Salaries or other incident Charges as shall be necessary in and for the receiving collecting levying or managing of the same Duties Any thing in this Act contained to the contrary notwithstanding.