29 C.F.R. § 401.11 Secret ballot.
Title 29 - Labor
Secret ballot means the expression by ballot, voting machine, or otherwise, but in no event by proxy, of a choice with respect to any election or vote taken upon any matter, which is cast in such a manner that the person expressing such choice cannot be identified with the choice expressed.
Title 29: Labor
PART 401—MEANING OF TERMS USED IN THIS SUBCHAPTER
§ 401.11 Secret ballot.