New York Laws
Article 6 - General Provisions Governing Property and Affairs
61 - Disposition of Property.

(b) A cooperative may not otherwise sell, mortgage, lease or otherwise
dispose of or encumber all or a substantial portion of its property
unless such sale, mortgage, lease or other disposition or encumbrance is
authorized by the affirmative vote of not less than two-thirds of the
total members of the cooperative.

Structure New York Laws