Section 24-516. Newtown creek sewers

All  sewers  emptying  directly or
  indirectly into Newtown creek shall be closed and may be  used  only  as
  tributaries  to  other  sewers  not emptying directly or indirectly into
  such creek; except that whenever, by reason of heavy rainfall  or  snow,
  the  sewage  and  drainage  emptying  into  the sewer in Johnson avenue,
  borough of Brooklyn, shall be more than such sewer or its extension will
  carry to the East river, the  excess  may  be  discharged  into  Newtown
  creek.