16.2.6 In the event, in the opinion of the Investors, the Company is unable fully to comply with the provisions of Clause 16.2.1 to 16.2.5 above and/or pursuant to the provisions of Clause 18, the Investors shall have the right (but not the obligation) to sell and call upon the Promoters (''Security Purchasers") to purchase (the "Purchase Option") and the Security Purchasers shall be bound to purchase all of the respective Investor Securities (offered by the Investors) within a period of 30 (thirty) calendar days from the date of receipt by the Promoters of the Purchase Option notice issued by the Investors (the "Purchase Option Notice"). The purchase price for the Investor Securities (the "Purchase Price") shall be the Fair Value thereof or an amount equal to the Investment Amount plus an IRR of 15% (fifteen percent) per annum (compounded quarterly), whichever is higher (net of all Taxes payable in India). On receipt of the Purchase Option Notice by the Security Purchasers, the Security Purchasers, shall be obliged to buy the Securities of such Investors at the Purchase Price (net of all taxes payable in India). Subject to the prior approval of the Investors, the Promoters shall be entitled to nominate one or more Persons as Security Purchasers for compliance of the provisions of this Clause 16.2.6."