Section 27-2097. Registration; time to file

a. The owner of a dwelling
  required  to  register  under  this  article  shall  register  with  the
  department in accordance with the provisions of this article.
    b. A registration statement shall be filed:
    (1)  For  every  existing  multiple dwelling. A registration statement
  filed by the present owner of a dwelling pursuant to the requirements of
  the prior law shall constitute compliance with this section.
    (2) Prior to the issuance of  a  certificate  of  occupancy,  for  any
  multiple  dwelling  hereafter  erected,  or  any  dwelling  or  building
  hereafter altered or converted to a multiple dwelling.
    (3) For all one- and two-family dwellings where neither the owner  nor
  any  family  member  occupies the dwelling and thereafter not later than
  ten days after the date neither the owner nor any family member occupies
  the dwelling. For purposes of this paragraph, "family member" shall mean
  an owner's  spouse,  domestic  partner,  parent,  parent-in-law,  child,
  sibling, sibling-in-law, grandparent or grandchild.
    (4)  On  or  before  July first, nineteen hundred eighty-four, for any
  garden-type maisonette  dwelling  project  consisting  of  a  series  of
  dwelling  units  which  together  and in their aggregate are arranged or
  designed to provide three or more apartments,  and  are  provided  as  a
  group  collectively with all essential services such as, but not limited
  to, house sewers and heat, and which are operated as a unit under single
  ownership, notwithstanding that certificates of  occupancy  were  issued
  for portions thereof as private dwellings.
    (5)  Within  such time as provided in section 27-2099 of this article,
  in the case of a change of  ownership  where  registration  is  required
  under this article.
    c.  An owner who is required to register shall file a new registration
  statement annually.
    d. An owner who is required to register shall file a new  registration
  statement  on  the  registration  date  assigned to that dwelling by the
  department whether or not that owner filed a registration statement  for
  that dwelling previously.
    e.  The  registration  date  of  a  dwelling  shall be a calendar date
  assigned  by  the  department  to  that  dwelling  for  the  purpose  of
  registration on such date at intervals of one year.