Section 62(5)(ii) in The Bihar Panchayat Election Rules, 2006
(ii)If any voter refuses to allow the inspection of his/her left forefinger or mark it with indelible ink or if the left forefinger is already marked with such ink or if it is evident that he/she has attempted to remove such ink mark, he/she shall not be entitled to be supplied with any ballot paper or to record his vote at the election.