Provided always, and be it enacted, That the buying and selling of Game by any Person or Persons employed on the Behalf of any licensed Dealer in Game, and acting in the usual Course of his Employment, and upon the Premises where such dealing is carried on, shall be deemed to be a lawful buying and selling in every Case where the same would have been lawful if transacted by such licensed Dealer himself: Provided also, that nothing herein contained shall prevent any licensed Dealer in Game from selling any Game which shall have been sent to him to be sold on account of any other licensed Dealer in Game.