28. Maintenance of drainage
The owner of any premises shall, at his or her own expense, maintain in good order and repair a satisfactory system of drainage where so required by the Sewerage Authority exercising powers under this Act. If any such owner neglects to carry out the necessary works of maintenance and as a result of such neglect the system of drainage is no longer regarded by the Sewerage Authority as satisfactory, then the Sewerage Authority may proceed in manner laid down in section 9 hereof to secure the provision to the premises of a satisfactory system of drainage provided always that where a medical officer shall certify in writing that the condition of, or the absence of a system of drainage to the premises constitutes a nuisance, the removal of which as a matter of urgency is necessary for the preservation of public health or convenience, then the Sewerage Authority may, by notice to the owner of the building requiring the provision of a satisfactory system of drainage in manner laid down in section 9 hereof, require the necessary works to be carried out and may, if the works are not expeditiously put in hand within 12 hours of the time at which the notice requiring the works to be executed was served upon the owner, themselves execute the works and in such circumstances the provisions of section 10 for securing repayment of the expenses thereby incurred shall apply.