N.Y.C. Admin. Code § 4-109: § 4-109 City real property; sale of.

City real property, including buildings, fixtures and machinery therein, shall be sold in the manner prescribed in subdivision b of section three hundred eighty-four of the charter pursuant to a resolution adopted by the board of estimate, and such sale shall be under the sole supervision of such board. In case such buildings, fixtures and machinery be sold at public auction, the board of estimate may provide as a condition of such sale that such buildings, fixtures or machinery shall not in any case be relocated or re-erected within the lines of any proposed street or other public improvement, and if after such sale such buildings or parts of buildings or other structures be relocated or re-erected within the lines of any proposed street or other public improvement, title thereto shall thereupon become vested in the city and a resale at public or private sale may be made in the same manner as if no prior sale had been made of the same.