New York Consolidated Laws, General Associations Law - GAS § 7. Changing articles of association

Any change in the articles of association of a joint-stock association not inconsistent with law may be made with the consent of all its stockholders, or otherwise, as the articles of association may provide.  Unless the articles of association of a joint-stock association contain provisions to the contrary, its directors may be increased or reduced to not less than three;  its capital stock may be increased or reduced;  or the term of its existence may be extended, with the consent of its stockholders owning at least two-thirds of its stock issued and outstanding, on the following terms and conditions:  The consent of the requisite number of stockholders must be given by vote, or by writing presented and filed, at a regular or regularly called special meeting.  Notice of the time and place of such meeting, with notice of the proposed change, must be personally served on each stockholder of the association at least thirty days before the meeting, or by mailing it to such stockholder at his last-known post-office address at least sixty days before the meeting.  The amount of its capital stock shall not be reduced below the amount of its paid-up capital stock, nor shall it be reduced if the liabilities of the association exceed its assets.