Sec. 21. The affidavit of challenge prescribed by section 20 of this chapter must set forth under oath or affirmation the following:
(1) The name of the challenger.
(2) The name of the person being challenged.
(3) The reasons the challenger believes the person being challenged is not a legal voter in the precinct.
(4) The source of the information provided under subdivision (3).
(5) A statement that the challenger understands that making a false statement on the affidavit is punishable under the penalties of perjury.