Provides that the term "landlord" when used in the real property law, shall not include or apply to any corporation, entity or organization, hereinafter known as a "cooperative entity" that is or is operating for the purpose of providing housing and/or residences for its shareholders by leasing or subleasing to such shareholders, under proprietary leases or occupancy agreements or subleases of such leases or occupancy agreements of apartments or residences in the buildings or premises owned by such cooperative entities; makes related provisions for the term "tenant".