N.Y. Comp. Codes R. & Regs. tit. 9 § 2525.3 : EXECUTIVE DEPARTMENT — Division of Housing and Community Renewal — Rent Stabilization Regulations — Rent Stabilization Code — Prohibitions — Conditional rental

(a) No owner or other person shall require a tenant or prospective tenant to purchase or lease, or agree to purchase or lease, furniture or any other personal property, including but not limited to shares to an apartment, prior to the acceptance for filing by the Attorney General of a plan of cooperative conversion, as a condition of renting housing accommodations.
(b) No owner or other person shall require a tenant, prospective tenant or a prospective permanent tenant to represent or agree as a condition of renting a housing accommodation that the housing accommodation shall not be used as the tenant's or prospective tenant's primary residence, or the prospective permanent tenant's principal residence.
(c) No owner or other person shall require a tenant or prospective tenant to sign a lease or other rental agreement in the name of a corporation or for professional or commercial use as a condition of renting a housing accommodation when the housing accommodation is to be used as the primary residence of the prospective tenant for residential purposes.
(d) No owner or other person shall engage in any practice, including but not limited to illusory or collusive rental practices which deprive a tenant in possession of his or her rights under this Code.
(e) The term other person as used in this section shall include an agent, or any other employee of an owner, or any other entity, acting with or without the authority of the owner.

N.Y. Comp. Codes R. & Regs. Tit. 9 § 2525.3