Section 162. Single ownership

The owner of any site or plot upon which a
  garden-type maisonette dwelling project is proposed to be erected  shall
  execute  and  file  in the office of the recording officer in the county
  where deeds of conveyances are recorded an instrument in  writing  which
  shall  declare  that,  so  long  as  any of the buildings proposed to be
  erected remain standing, a conveyance of  any  part  or  parts  of  such
  project  shall,  thereupon, cause all the buildings on such site or plot
  to be and become unlawful  structures,  and  any  prior  certificate  of
  occupancy  issued  for  such  structures  shall  thereupon  become void.
  Nothing in this section shall be deemed to prohibit the sale of any part
  of such project, provided, however, that the part which is  so  conveyed
  and  the remaining part of the project shall be made to comply to all of
  the applicable provisions of this chapter.