Bidder / OEM has to give an undertaking that after expiry of warranty period, it will provide Comprehensive Maintenance Service for next 7 years for the offered products at the rate not more than 5 % of contract price per annum. Buyer reserves the right to enter into a CMC agreement with the Successfu l Bidder / OEM after expiry of the Warranty period at above mentioned rate and the payment for the CMC c harges would be made Biannually after rendering of the CMC Services of the relevant CMC period. Perform ance Security of the successful bidder shall be forfeited if it fails to accept the CMC contract when called u pon by the buyer. CMC would include cost of all the spares Including UPS, PC, battery, LED wall, Sound syst em and all other equipment & upgradation of System Software & third party Software (Upload the underta king). The original Performance Security of contract will be returned only after submission and verification of CMC Performance Security for 3% of total CMC value valid up to CMC period plus 2 months (if there is n o other claim).