No person shall, and it shall be unlawful to, discharge, cause to be discharged, or
permit to be discharged any wastes or wastewater, or any object, material, or other
substance directly into a manhole or other opening into the sewerage facilities other
than wastes or wastewater through an approved building sewer; provided, however, that
wastes or wastewater may be discharged into the sewerage facilities by means other
than through an approved building sewer pursuant to a permit therefor issued by the
Director of Public Works.
