Section 209-C. Maps, plans and reports

The establishment or extension of an
  improvement district shall be based upon a map, plan and report prepared
  in  such  manner  and in such detail as determined by the town board and
  such map, plan and report shall be filed  in  the  office  of  the  town
  clerk.  In  the  case  of a sewer, drainage or water district such maps,
  plans and reports shall  be  prepared  by  a  competent  engineer,  duly
  licensed  by  the  state  of  New  York,  showing  the boundaries of the
  proposed district and a general plan of the proposed sewer, drainage  or
  water system, as the case may be, and a report of the proposed method of
  operation.  If  a sewer or drainage district is proposed, such map shall
  show all outlets and the terminus and course of each proposed main sewer
  or drain together with the location and a  general  description  of  all
  sewage disposal plants, pumping stations and other public works, if any,
  and shall be consistent with, so far as possible, any comprehensive plan
  for sewers developed and maintained pursuant to section ninety-nine-f of
  the general municipal law. If a water district is proposed, said map and
  plan  shall  show  the  source  of water supply and a description of the
  lands, streams, water or water rights to be acquired therefor, the  mode
  of  constructing  the  proposed  water  works  and the location thereof,
  including reservoirs,  water  purification  or  treatment  works,  water
  mains, distributing pipes and hydrants, and shall be consistent with, so
  far  as possible, any comprehensive plan for public water supply systems
  developed and  maintained  pursuant  to  section  ninety-nine-f  of  the
  general  municipal  law.  If, however, the supply of water to be used in
  said water district is  to  be  purchased  from  a  municipal  or  other
  corporation,  or  any person, then said map and plan shall set forth and
  show only the water mains, distributing pipes, hydrants, reservoirs,  if
  any, and location of each. Before any sewer system is constructed in any
  such  district, the town board shall cause a copy of the map and plan of
  the  proposed  sewer  system  and  sewage  disposal  plant  or  proposed
  extension  thereto  to  be  submitted to the state department of health,
  and, if approved,  it  shall  be  filed  in  the  office  of  the  state
  department  of health and the town clerk. The state department of health
  may require profiles to be submitted for any sewers or drains  shown  on
  such map and plan. Such map and plan may be amended with the approval of
  the  state  department  of health and if approved, shall be filed in the
  office of the state department of health and the town clerk.