Section 79. Heating

1.  Every multiple dwelling exceeding two stories in
  height and erected after April eighteenth, nineteen hundred twenty-nine,
  and every garden-type maisonette dwelling project  erected  after  April
  eighteenth, nineteen hundred fifty-four, shall be provided with heat. On
  and  after  November  first, nineteen hundred fifty-nine, every multiple
  dwelling shall be provided with heat  or  the  equipment  or  facilities
  therefor.  During the months between October first and May thirty-first,
  such  heat  and  the  equipment  or  facilities  shall  be sufficient to
  maintain the minimum temperatures required by local law, ordinance, rule
  or regulation, in all portions of the  dwelling  used  or  occupied  for
  living  purposes provided, however, that such minimum temperatures shall
  be as follows:   (a) sixty-eight degrees  Fahrenheit  during  the  hours
  between  six  o'clock  in  the  morning  and ten o'clock in the evening,
  whenever  the  outdoor  temperature  falls  below   fifty-five   degrees
  Fahrenheit, notwithstanding the provisions of paragraph a of subdivision
  four  of  section  three  of  this  chapter, and (b) at least fifty-five
  degrees Fahrenheit during the hours between ten o'clock in  the  evening
  and  six  o'clock in the morning, whenever the outdoor temperature falls
  below forty degrees Fahrenheit. Nothing in this section shall be  deemed
  to  relieve  any  owner  of  the duty of providing centrally supplied or
  other approved source of heat prior to November first, nineteen  hundred
  fifty-nine  in  any  case where such heat is required by this chapter or
  any other law, ordinance,  rule  or  regulation  to  be  supplied  in  a
  dwelling  prior  to  said date. The heating system in dwellings used for
  single room occupancy shall be in conformity with  the  requirements  of
  section two hundred forty-eight.
    2.  The  provisions of subdivision one shall not apply to any dwelling
  (a) which is located in a resort community and is rented or occupied  on
  a  seasonal  basis between April fifteenth and October fourteenth during
  any calendar year and is not occupied for  living  purposes  during  the
  remainder  of  such  year, except that occupancy of any such dwelling by
  the family of a caretaker thereof or by the family of the owner  thereof
  during  the  remainder  of the year shall be permitted; or (b) which the
  department of city planning certifies is in an area to be acquired for a
  public improvement or for development or redevelopment and for which (1)
  a request for acquisition has been submitted to the mayor  by  a  public
  agency  or  (2)  a  plan  for a development or redevelopment project has
  received preliminary or first approval of the city planning  commission;
  or  (c) for which a demolition permit has been or shall be issued by the
  municipality pursuant to local law or ordinance.
    3. The exemption provided in subdivisions two (b) and two (c) of  this
  section  shall be valid for a period of six months after the date of the
  approval of the slum clearance or urban renewal plan or the date of such
  certification or the date of the issuance of the demolition  permit,  as
  the case may be, but such exemption may be extended from time to time by
  the  department  provided, however, that such exemption shall not extend
  beyond November first, nineteen hundred sixty-one.