1. - Since common questions of law and facts are involved in all these writ applications, they were heard together and are being decided by this common order.

2. In one batch of writ applications, the petitioners have prayed that the order dated 7th March, 2007 passed by the Rajasthan Electricity Regulatory Commission, Jaipur (hereinafter referred to as "the Regulatory Commission") whereby the Regulatory Commission has approved the draft of Rajasthan Electricity Regulatory Commission (Renewable Energy and Cogeneration Obligation) Regulations, 2006 with changes in Regulations 4 and 5 pertaining to renewable energy obligation (RE Obligation) and payment of renewable energy surcharge for short fall in obligation and the Notification dated 23.3.2007 by which the Regulatory Commission in exercise of the powers conferred by Section 86(1) (e) read with section 181 of the Electricity Act, 2003 (Act 36 of 2003) (hereinafter referred to as "the Act of 2003") has framed and notified the Rajasthan Electricity Regulatory Commission (Renewable Energy Obligation) Regulations, 2007 (hereinafter referred to as "the Regulations of 2007") imposing obligation on the captive power plants and op