81. The Société de développement de la Baie-James to which the Government issued, prior to 11 November 1975, exploration permits on lands classified as Category II lands under this Act may, in accordance with such permits, carry out exploration activities on such lands and exploit the ore deposits forming the subject of such permits as though such lands were Category III lands. In the case of exploration activities, section 82 does not apply. In the case of exploitation of ore deposits, sections 70 to 74 apply.