New York Laws
Part 2 - Formation and Construction of Lease Contract
2-A-204 - Formation in General.

(1) A lease contract may be made in any manner sufficient to show
agreement, including conduct by both parties which recognizes the
existence of a lease contract.
(2) An agreement sufficient to constitute a lease contract may be
found although the moment of its making is undetermined.
(3) Although one or more terms are left open, a lease contract does
not fail for indefiniteness if the parties have intended to make a lease
contract and there is a reasonably certain basis for giving an
appropriate remedy.