(a) The type, capacities, location and layout of the private sewage disposal system shall comply with all recommendations and requirements of the Water Pollution Control Section of the State Department of Health and Environment. No permit shall be issued for any private sewage disposal system employing subsurface soil absorption facilities where the area of the lot is less than one acre. No septic tank or cesspool shall be permitted to discharge to any public sewer or natural outlet.
(b) At such time as a public sewer becomes available to a property served by a private sewage disposal system, as provided in § 15-402, a direct connection shall be made to the public sewer in compliance with this article, and any septic tank, cesspool and similar private sewage disposal facilities shall be abandoned and filled with suitable and acceptable materials.