The poll panel, which maintained that Electronic Voting Machines (EVMs) cannot be tampered with, told the apex court that around 70,000 Voter Verified Paper Audit Trail (VVPATs) units would be required for the Gujarat polls scheduled later this year.
It said that around 48,000 units were expected to be delivered by Bharat Electronics Ltd (BEL) and Electronics Corporation of India Ltd (ECIL) by August 31 while another 25,500 such units would be delivered by September.
The VVPAT machine is connected with EVMs and dispenses a paper proof for the voters so that they can verify their vote is cast correctly.
The ECI further said that currently it was in possession of 53,500 VVPAT units.
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"It is pertinent to point out herein that the Election Commission of India (ECI) currently has 53,500 of VVPAT units in its possession and the number of VVPAT units required for conducting election to the Gujarat legislative assembly is 70,000 units.
It, however, said that though there has been a debate over alleged EVM tampering but "no political party or person" was able to demonstrate how these machines could be tampered with during the course of open EVM challenge.
The ECI's affidavit was filed in pursuance to the apex court's July 6 directive asking it to file a response on the possibility of using EVMs with VVPATs in the Gujarat polls.
Petitioner Reshma Vithabhai Patel, the convener of Patidar Anamat Andolan Samiti, which was in the forefront of the Patel quota agitation, had claimed that the EVMs were not "fully reliable, foolproof, tamper-proof or hacker-proof".
The ECI should be asked to replace EVMs with ballot paper or to ensure VVPAT for every EVM, she had demanded.
Patel's plea had also alleged that the names of thousands of members of a "particular community" were missing from voter lists in the 2015 municipal corporation polls. It had sought the court's direction to the ECI to prevent this in future.