Provided always, and be it enacted, That the Galeage Rent, Royalty, Tonnage Duty, or other Payments to be ascertained and determined by the said Commissioners hereby appointed as payable and to be paid to Her Majesty, Her Heirs and Successors, as aforesaid, for or in respect of Coal or Iron Ore to be got by means of the several Gales, Pits, Levels, or Works now existing within the said Hundred, and which shall be set forth in their said Award, shall be deemed and taken in lieu of the Right of Her Majesty, Her Heirs and Successors, to put in a Fifth Man to work the said Gales, Pits, Levels, or Works respectively and share the Profit thereof, such Right being the Basis and Maximum of the Calculation to be made for ascertaining the said Galeage Rent, Royalty, or Tonnage Duty payable and to be paid to Her Majesty, Her Heirs and Successors, as aforesaid.