Section 199. Challenge of illegal voters - Omnibus Election Code

(a) Any voter, or watcher may challenge any person offering to vote for not being registered, for using the name of another or suffering from existing disqualification. In such case, the board of election inspectors shall satisfy itself as to whether or not the ground for the challenge is true by requiring proof of registration or the identity of the voter; and

(b) No voter shall be required to present his voter's affidavit on election day unless his identity is challenged. His failure or inability to produce his voter's affidavit upon being challenged, shall not preclude him from voting if his identity be shown from the photograph, fingerprints, or specimen signatures in his approved application in the book of voters or if he is identified under oath by a member of the board of election inspectors and such identification shall be reflected in the minutes of the board.