New York Consolidated Laws, Limited Liability Company Law - LLC § 606. Withdrawal of a member

(a) A member may withdraw as a member of a limited liability company only at the time or upon the happening of events specified in the operating agreement and in accordance with the operating agreement. Notwithstanding anything to the contrary under applicable law, unless an operating agreement provides otherwise, a member may not withdraw from a limited liability company prior to the dissolution and winding up of the limited liability company. Notwithstanding anything to the contrary under applicable law, an operating agreement may provide that a membership interest may not be assigned prior to the dissolution and winding up of the limited liability company.

(b) A limited liability company whose original article  1 of organization were filed with the secretary of state and effective prior to the effective date of this subdivision shall continue to be governed by this section as in effect on such date and shall not be governed by this section, unless otherwise provided in the operating agreement.