84.1. The holder of a mining exploration licence has an exclusive right to explore for mineral substances in the territory for which the licence is issued, with the exception of(1) petroleum, natural gas and brine;
(2) sand other than silica sand used for industrial purposes, gravel, common clay used in the manufacture of clay products and every other mineral substance found in its natural state as a loose deposit, as well as inert mine tailings used for construction purposes;
(3) in the part of the territory also subject to a licence to explore for surface mineral substances or an exclusive right to mine surface mineral substances, every other surface mineral substance.