The principal Act is amended in section 66, commas 91) and (2) by providing anew that the holder of a large-scale mining licence shall in accordance with the licence, this Act and the terms of any relevant development agreement, pay to the Republic, a royalty on the gross value of minerals produced under the licence at a specified rate. Provided that if the Minister considers that the realised price does not correspond to the price that would have been paid for the minerals if they had been sold