1976: (i) the Central Government or a Government company or a corporation owned, managed or controlled by the Central Government, or (ii) a person to whom a sub lease, referred to in the proviso to clause (c) has been granted by any such Government, company or Corporation, or (iii) a company engaged in the production of iron and steel, shall carry on coal mining operation in India, in any form; (b) excepting the mining leases granted before such commencement in favour of the Government, company or corporation, referred to in clause(a), and any sub lease granted by any such Government, company or corporation, all other mining leases and sub leases in force immediately before such commencement, shall, in so far as they relate to the winning or mining of coal, stand terminated; (c) no lease for winning or mining coal shall be granted in favour of any person other than the Government, company or corporation, referred to in clause(a): Section 4 of the same Act super adds severe punishment for contravention of the prohibition contained in section 3(3).