Mumbai: After the Civil Aviation Ministry recently approved the revised tender document for the proposed Navi Mumbai airport, the nodal implementing agency Cidco has extended the deadline to submit requests for qualification (RFQs) to September 2. Last week, a Cidco delegation had presented a revised tender document draft to Aviation Minister Ashok Gajpathy Raju, which he approved immediately. This is the second extension for the bids since June 18. “Bidders had requested us to make certain changes in the existing tender document.