The deal, allowing the United States to sell atomic technology and fuel to India, still requires the nod from India's Congress-led government's Communist allies.

The Communists have been bitterly critical of the deal, but their support is needed for it to clear the Indian parliament.

"All concerns of India have been reflected and have been adequately addressed," Foreign Minister Pranab Mukherjee told reporters after two cabinet committees both "approved the agreement."

The accord is aimed at helping India meet its soaring energy demands by reversing three decades of US sanctions imposed over nuclear tests carried out by India in 1974 and 1998.

The fine-print of the accord, broadly clinched during a visit to India by US president George W. Bush in March 2006, was hammered out last week in Washington during a visit by National Security Advisor M.K. Narayanan and Foreign Secretary Shivshankar Menon.

The implementation agreement, or "123 agreement," is intended to capture all operational aspects of the nuclear deal, which is also aimed at galvanising strategic ties between the world's two biggest democracies.