SECI has invited RfS bids for the development of 2,500 MW of ISTS-connected wind power projects under Tranche VI. This is a global tender, in which limited liability partnerships (LLPs) are not eligible to participate. A single bidder can bid for a minimum of 50 MW and a maximum of 300 MW. The projects are required to be designed for interconnection with the Central Transmission Utility (CTU) network at voltage levels of 220 kV or above. The developers will be responsible for the maintenance of the transmission system up to the interconnection point. They will also be responsible for obtaining all the approvals, permits and clearances required, including those required from state governments. The projects will be developed on a BOO basis and the successful bidders will enter into 25-year PPAs with SECI. The time frame for commissioning the project has been set at 18 months from the effective date of the PPA. A developer will be allowed a maximum of 27 months to commission the project.