It will now be enough to say by way of a summing up of the provisions of the Nationalisation Amendment Act that: (1) by section 3(3) (a) of the which was introduced by the Nationalisation Amendment Act, no person other than those mentioned in clauses (i) to (iii) can carry on coal mining operations after April 29, 1976, being the date on which section 3 of the Nationalisation Amendment Act came into force; (2) by section (3)(3)(b) all mining leases and sub leases stood terminated except those granted before April 29, 1976 in favour of the Central Government, a Government company or corporation owned, managed or controlled by the Central Government; (3) section (3)(c) prohibits the granting of a lease for winning or mining coal in favour of any person other than the Government, a Government company or a corporation of the above description provided that a sub lease could be granted by these authorities to any person if the two conditions mentioned in the proviso are satisfied; and (4) when a mining lease stands terminated under section 3(3), "it shall be lawful" for the Central Government or the Government company or the corporation owned or controlled by the Central Government to obtain a prospecting licence or a mining lease in respect of the whole or part of the land covered by the mining lease which stands terminated.