Where a direction referred to in section 8 or 10 is not complied with and the time for compliance with the direction has expired, an authorised person may carry out or cause to be carried out anything required by the direction to be done and, without affecting the liability of any person to be proceeded against for an offence against this Act or the recovery of a penalty in any such proceedings, the authorised person may recover as a debt due from the person to whom the direction was given the amount of the expenses thereby incurred.