Article 29, section 3 states:
The Polling Officer or the employee deputed by him or her shall indicate a mark with indelible ink in the joint of nail and flesh on thumb of the left hand of the voter prior to providing a ballot paper to the voter for voting. The mark should be indicated in the index finger, if the voter does not have the thumb of the left hand and in the finger of the right hand likewise in the case of the left hand if the voter does not have such finger of the left hand. If the voter does not have any finger of both hands, provision shall be made that he or she can vote through any person whom he or she chooses.