The Commissioners of Her Majesty's Treasury shall annually pay to each of John Cay Esquire, Sheriff of the County of Linlithgow, John Tait Esquire, Sheriff of the Counties of Kinross and Clackmannan, Erskine Daniel Sandford Esquire, Steward of the Stewartry of Kirkcudbright, and Sheriff of the County of Wigton, Robert Hunter Esquire, Sheriff of the Counties of Dumbarton and Bute, and Benjamin Robert Bell Esquire, Sheriff of the Counties of Banff, Elgin, and Nairne, out of Monies to be voted by Parliament for that Purpose, a Sum equal to One Fifth of the total Amount which shall be ascertained by the Queen and Lord Treasurer's Remembrancer in Exchequer to have been paid annually, on an average of the last Three Years, to the Sheriffs Commissary, in respect of Proofs taken by them in Consistorial Causes ; but such Sum shall only be paid as long as the said Persons shall hold the Office of Sheriff in any County in Scotland, and no longer.