(1) The Bureau may cancel a licence issued under this Act, if it is satisfied that the licensee
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| (a) has contravened any term or condition attached to such licence ; | | |
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| (b) has not carried out any lawful direction given to him by the Bureau ; | | |
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| (c) carries on wasteful mining despite prior warning given in writing by the Bureau against such mining; | | |
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| (d) has suspended, curtailed or ceased to carry on any activity authorized by such licence for a period of over six months without the permission "of the Bureau ; | | |
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| (e) has surrendered his licence subject to satisfaction of the requirements of this Act; or | | |
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| (f) has been convicted of an offence under this Act or of any regulation made thereunder. | | |
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