9 NYCRR § 2104.5 — Occupancy by landlord or immediate family (State Rent & Eviction Regs., via Cornell LII)

(1) In the case of a housing accommodation in
a structure or premises owned by a cooperative corporation or association, a
certificate shall be issued by the administrator to a purchaser of stock where
(i) the tenant originally obtained possession of the housing accommodation by
virtue of a rental agreement with the tenant-owner; or (ii) the stock was
acquired by the purchaser prior to July 1, 1955 and more than two years prior
to the date of the filing of the application; or (iii) the stock was acquired
by the purchaser on or after July 1, 1955 and more than two years had expired
since the date of filing the notice of sale with the local rent office as
hereafter provided in subparagraph (3)(v) of this subdivision; or (iv) the
stock was acquired less than two years prior to the date of filing of the
application and on that date stock in the cooperative has been purchased by
persons who are tenant-owners of at least 80 percent of the housing
accommodations in the structure or premises and are entitled by reason of stock
ownership to proprietary leases of housing accommodations in the structure or
premises; or (v) the cooperative was organized and acquired its title or
leasehold interest in the structure or premises before February 17, 1945 and on
that date stock in the cooperative allocated to 50 percent or more of the
housing accommodations in the structure or premises was held by individual
tenant-owners, who are or whose assignees or subtenants are in occupancy of
such housing accommodations in the structure or premises at the date of the
filing of the application.