12 U.S.C. § 2208

In any election or merger vote, or other proceeding subject to a vote of the stockholders (or subscribers to the guaranty fund of a bank for cooperatives), conducted by a lending institution of the Farm Credit System, the institution— (1) may not use signed ballots; and (2) shall implement measures to safeguard the voting process for the protection of the right of stockholders (or subscribers) to a secret ballot.