N.Y. Banking Law § 9019
No mutual savings bank and no mutual savings and loan association shall convert to stock form unless all depositors (in the case of such savings banks) and all shareholders (in the case of such savings and loan associations) of any such converting institution whose aggregate deposit or share balance, as the case may be, (as shown on the books and records of the converting institution) equals at least one hundred dollars as of a record date to be established in accordance with general regulations of the superintendent of financial services are provided with an opportunity to approve such conversion, either in person or by valid proxy, at a meeting duly convened in accordance with general regulations of the superintendent of financial services for the purpose of approving or disapproving such conversion. At such meeting, each depositor or shareholder shall be entitled to cast one vote for each full one hundred dollars of deposits or shares of such depositor or shareholder shown on the books and records of the converting institution as of such record date. A depositor or shareholder shall not be entitled to cast any votes for any deposit or share balances in amounts of less than one hundred dollars. No such conversion shall be effective unless approved by the affirmative vote of at least seventy-five per centum of the aggregate dollar amount of the book value of deposits or shares, as the case may be, represented (either in person or by proxy) at such duly convened meeting and entitled to vote thereat.
N.Y. BankingLaw § 9019