(1) At the time of removal or consumption of mineral from the mining lease area, the lessee shall calculate the amount of Royalty, payment to the District Mineral Foundation, payment to the National Mineral Exploration Trust, based on the latest available average sale price of the said mineral grade and pay the same to the Government as provisional payment for the same.
(2) After the publication of the Average Sale Price of the Minerals for the month by the Indian Bureau of Mines, due adjustment of the actual amounts payable against the provisional payment may be made:
Provided that if for a particular mineral grade / concentrate, the average sale price for a State for a particular month is not published by the Indian Bureau of Mines, the last available information published for that mineral grade / concentrate for that particular State by the Indian Bureau of Mines in the last six months previous to the month for which assessment is done shall be used, failing which the latest information for All India for the mineral grade / concentrate, shall be used.