The Wealth of Nations by Part 4 Chapter 4 Page 8

Only a part, therefore, of the duty called the impost on wine, and no part of the twenty-five pounds the ton upon French wines, or of the duties imposed in 1745, in 1763, and in 1778, were allowed to be drawn back upon exportation. The two imposts of five per cent, imposed in 1779 and 1781, upon all the former duties of customs, being allowed to be wholly drawn back upon the exportation of all other goods, were likewise allowed to be drawn back upon that of wine. The last duty that has been particularly imposed upon wine, that of 1780, is allowed to be wholly drawn back, an indulgence which, when so many heavy duties are retained, most probably could never occasion the exportation of a single ton of wine.

These rules take place with regard to all places of lawful exportation, except the British colonies in America.