Section 21B(9)(g) in Andhra Pradesh Co-Operative Societies Rules, 1964
(g)Immediately before the commencement of the poll, the election presiding officer shall show the empty ballot box to such persons as may be present at the time and shall then lock it up and affix his seal in such manner as to prevent its being opened without breaking the seal. The candidate or his agent may also affix, his signature on the seal, if he so desires.