That is the demand of Pakistan, which is undergoing a severe economic turmoil. Government officials are tightlipped. The Prime Minister's Office refused to speak on the matter, passing the buck on to the ministry of external affairs. And the latter pleaded that since the talks are still going on, it would be premature to reveal the demands and where they stand.
Media reports state that India has a list of demands for signing the dotted line.
The US is desperate to salvage the Comprehensive Test Ban Treaty and the Non-Proliferation Treaty, which India has almost blown off. The restraint that this will put on India is to be a 'responsible' nuclear power, which means not to export technology to countries like Libya or Iraq, most of which India has more or less agreed to. The US is also demanding that India not deploy its nuclear arms, but India is still to agree to that. The fact that the ongoing talks have stalled, with Vajpayee's special envoy Jaswant Singh and US Deputy Secretary of State Strobe Talbott due to meet once more in November, only proves that both sides are bargaining hard and that the talks still have much ground to cover. The US is apparently unwilling to accept India as a de facto nuclear state, fearing that this might tempt others to conduct nuclear tests and then claim the same privileges.