(2) In the event of any such person being convicted of an offence against the Act or of an offence under the enactments relating to the Customs as applied by the Act the Governor General may by notice in the Gazette withdraw the authorisation aforesaid, if, in the opinion of the Governor General, such person cannot properly be allowed to carry on the business of manufacturing or selling or distributing as the case may be, any such drug. However, the Governor General shall, before withdrawing the authorisation in the case of any such person, consult the Medical Board.