5 C.F.R. § 2421.15 Secret ballot.
Title 5 - Administrative Personnel
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, except in that instance in which any determinative challenged ballot is opened.
Title 5: Administrative Personnel
PART 2421—MEANING OF TERMS AS USED IN THIS SUBCHAPTER
§ 2421.15 Secret ballot.