NEW DELHI: The EC has introduced a QR code-based verification system to regulate access of persons to counting halls on May 4, the day of poll results. The system will be extended to all future elections to Lok Sabha and state/UT assemblies.As part of counting arrangements on May 4, a three-tier security mechanism has been prescribed for verification of identity at counting centres. At first and second tiers, photo ID cards issued by respective returning officers will be checked manually.At the third and innermost security cordon near a counting hall, entry shall be permitted only after successful verification through QR-code scanning.New QR code-based photo ID cards will be applicable for different categories of persons authorised by the EC to enter counting centres and halls.