(a) The election officers shall reject the vote of any person at any primary or election who shall give or promise or offer to give to an elector, any money, reward or other valuable consideration for his vote at such primary or election or for withholding the same, or who shall give or promise to give such consideration to any other person or party for such elector's vote or for the withholding thereof, or who shall receive or agree to receive for himself or for another any money, reward or other valuable consideration for his vote at such primary or election, or for withholding the same.

(b) The vote of any elector shall be rejected by the election officers if they or any one of them shall of their own knowledge know him to be guilty of a violation of any of the provisions of this section, or if upon challenge of such elector by any qualified elector, election officer, overseer or watcher, it shall be proved to their satisfaction that such elector has violated the provisions of this section, and in no case shall any elector so challenged be permitted to vote, unless he shall make written affidavit that the matter of the challenge is untrue.