However, Joseph Biden ranking Democrat on the Senate Foreign Relations Committee, who takes over chairmanship of the panel in January, declined to oblige saying such issues should be dealt with by the new Democrat controlled Congress.

The final reconciled version also substantially addresses India's potential deal breaker concerns over provisions relating to export of nuclear materials or technology, an end-use monitoring programme and a cooperative proliferation monitoring mechanism.

Some of the conditions are more suggestive now than prescriptive, analysts noted. Section 115 of the Senate bill proposing a proliferation monitoring mechanism for one now only "authorises" the US Energy Secretary to enter into such an arrangement.

Some in the Indian nuclear establishment saw this as a potentially mischievous clause that could enable Washington to monitor India's strategic assets.

Similarly, India's concern about Iran and a couple of other issues have been addressed by making them presidential reporting requirements rather than prescriptive sections of the bill.