Where provision is made by or under this Act or any local enactment incorporating any provisions of Schedule 4 for the imposition of a daily penalty in respect of a continuing offence, the court by which a person is convicted may fix a reasonable period from the date of the conviction for compliance by that person with any directions given by the court, and, where the court has fixed such a period, the daily penalty shall not be recoverable in respect of any day before the expiration thereof.