The Central Government may whenever it thinks it necessary so to do, by notification in the Official Gazette require that no person shall on and from such date as may be specified in the notification engage himself as a broker, manufacturer or dealer in tea waste or engage himself in the business of blending tea except under and in accordance with the provisions of a licence issued by the Board in accordance with the rules made under this Act; and any person who on and after such date so engages himself without obtaining a licence issued by the Board shall be deemed to have contravened the provisions of this section.