Any person who contravenes or fails to comply with this provision of the regulation is guilty of an offence and upon conviction liable to a fine or to imprisonment for a period not exceeding 12 months and, in the case of a continuous offence, to an additional fine of R500,00 for each day on which the offence continues or to additional imprisonment of one day for each day on which the offence continues: Provided that the period of such additional imprisonment must in no case exceed 90 days.