The contractual arrangements between the IPP, Eskom and government (i.e. the DOE and the National Treasury) were illustrated. The RFP's received from IPP's were subjected to a qualification process. Preferred bidders had to meet all six qualification criteria. If the bid was over- subscribed, the bidders were subjected to a comparative evaluation process. The comparative evaluation assessed the economic development criteria (30%) and the price criteria (70%). The bids received for Window 2 would be subjected to the additional comparative evaluation process, which had not been necessary for Window 1.