2010 New York Code
RPA - Real Property Actions & Proceedings
721 - Person who may maintain proceeding.

§  721.  Person  who  may maintain proceeding.   The proceeding may be
  brought by:
    1. The landlord or lessor.
    2. The reversioner or remainderman next entitled to possession of  the
  property  upon  the  termination of the estate of a life tenant, where a
  tenant of such life tenant holds over.
    3. The purchaser upon  the  execution  or  foreclosure  sale,  or  the
  purchaser  on  a tax sale to whom a deed has been executed and delivered
  or any subsequent grantee, distributee or devisee claiming title through
  such purchaser.
    4. The person forcibly put out or kept out.
    5. The person with whom, as owner, the  agreement  was  made,  or  the
  owner  of  the  property  occupied  under  an agreement to cultivate the
  property upon shares or for a share of the crops.
    6. The person lawfully entitled to the possession of property intruded
  into or squatted upon.
    7. The person entitled to possession of the  property  occupied  by  a
  licensee who may be dispossessed.
    8.  The  person,  corporation  or law enforcement agency authorized by
  this article to proceed to remove persons using  or  occupying  premises
  for illegal purposes.
    9.  The  receiver of a landlord, purchaser or other person so entitled
  to apply, when authorized by the court.
    10. The lessee of the premises, entitled to possession.
    11. Not-for-profit corporations, and tenant associations authorized in
  writing by the commissioner of the department of the city  of  New  York
  charged with enforcement of the housing maintenance code of such city to
  manage residential real property owned by such city.

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